hmmm. Interesting question. And some interesting responses thus far.
I've done this before at least twice. Let's see if this would still be close to what I suggested before. I'll take a stab...
5e Release: Stardate whoknows.sometime.whenever mark 1.
"Dungeons & Dragons 5th edition Basic Set": A lovely boxed set with the Basic game details (presumably these are 4 classes, 4 races, no "advanced modular stuff"), covering levels 1-4. Has a PHB, DMG, set of dice, "getting started" adventure module...let's call it BG1 [Basic Game 1].
"Dungeons & Dragons 5th edition: Player's Handbook": This is the "standard" game release, hard bound book including the "full standard rules and options" however many races that is, classes that is, rules with dials and maybe a few "optional/sidebar rules" that are not mandatory to the game.
"Dungeons & Dragons 5th edition: Dungeon Master's Guide": This is the "standard" game release, hard bound book including the "full standard rules and options", rules with dials and maybe a few "optional/sidebar rules", and "dungeon-building" information and advice that is treated with as much importance as "dungeon mastering" advice and information.
"SG1 -MenacingAdjective EvilNoun of PlaceName: An Adventure for Dungeons & Dragons 5th edition": Starting adventure for the "standard" game.
One month later...
"Dungeons & Dragons 5th edition: Monster Manual": This is the "standard" game release, hard bound book including D&D's most traditional/popular/historic/IP creatures, including tips and info for introducing/including monster race PCs, maybe a couple of special monster race classes, LOTS of tables/appendices for monster placement: by level, by terrain, by type, etc...
"BG 2: An adventure for Dungeons & Dragons 5e Basic Set." [low levels]
"BG 3: An adventure for Dungeons & Dragons 5e Basic Set." [mid levels]
"SG 3: An adventure for Dungeons & Dragons 5e" [low levels]
"SG 4: An adventure for Dungeons & Dragons 5e" [mid-levels]
"SG 5: An adventure for Dungeons & Dragons 5e" [high levels]
3 months from initial release date:
"Dungeons & Dragons 5th edition: Advanced Modules Manual": This is the "advanced" game release, hard bound book including a full array of additional rules' options, however many additional races or classes, additional rules and dials. None of this is mandatory unless you want to play an "all advanced" game. ALL of it is optional for addition to the Basic or Standard games.
"Dungeons & Dragons 5th edition: Deities & Demigods": This is the "standard" game release, hard bound book including the "standard" array of traiditonal D&D setting pantheons, rules for dealing with and/or attaining immortality/divinity, additional cleric/druid rules' options, powers, maybe a few additional spells, and advice and information on developing your own religions, temples, cults, gods/pantheons from scratch.
"BG 4: An adventure for Dungeons & Dragons 5e Basic Set." [low levels]
"BG 5: An adventure for Dungeons & Dragons 5e Basic Set." [mid levels]
"SG 6: An adventure for Dungeons & Dragons 5e" [mid levels]
"AG 1: An adventure for Dungeons & Dragons 5e: Advanced" [low levels]
6 months from initial release...
"Dungeons & Dragons 5th edition: World Builder's Tome": This is the "standard" game release that incorporates lots of "advanced" option sidebars (particularly for the exploration and interactive pillars), hard bound book including a full array of additional information, advice and optional rules for creating your own adventures (of any/all pillar types), traps, NPCs, treasure advice/info/tables and environments.
"Dungeons & Dragons 5th edition: Basic's Explorer": This is the equivalent of the "Expert" boxed set for the Basic Game, covering levels 5-15. Boxed set with PHB and DMG each with expanded rules, options, powers, maybe a few additional classes.
"Campaign Codex 1: Forgotten Realms for Dungeons & Dragons 5e." [since they've already said FR will be the standard game's default setting]: This is the "standard" game release, hard bound book including all setting relevant things for the Forgotten Realms campaign setting.
"BG 6: An adventure for Dungeons & Dragons 5e Basic Set." [mid levels]
"BG 7: An adventure for Dungeons & Dragons 5e Basic Set." [high levels]
"SG 7: An adventure for Dungeons & Dragons 5e" [mid levels]
"AG 2: An adventure for Dungeons & Dragons 5e: Advanced" [low levels]
1 year after release:
"Dungeons & Dragons 5th edition: Manual of the Planes": This is the "standard" game release that incorporates lots of "advanced" option sidebars (particularly for the exploration and interactive pillars), hard bound book including a full array of information, advice and options of traditional D&D extra-planar organization, creating your own cosmology, extra-planar NPCs & monsters, classes and extra-planar adventuring.
"Dungeons & Dragons 5th edition: Grimoire Compleat": This is the "standard" game release that incorporates lots of "advanced" option sidebars, hard bound book including a full array of ALL spells (released to date) for all spell-casting classes, information, advice and options of alternate magic systems, creating your own (and sample) mage guilds/organizations, psionics powers, magical societies/races...maybe additional/specialized/"prestige" caster classes.
"Dungeons & Dragons 5th edition: Fiend Folio": This is the "standard" game release, hard bound book including all new monsters, maybe a couple of new classes or monster PC races (if there's anything left). More tables/appendices for monster placement: by level, by terrain, etc...
"Campaign Codex 2: Greyhawk for Dungeons & Dragons 5e.": This is the "standard" game release, hard bound book including all setting relevant things for the Greyhawk campaign setting.
"BG 8: An adventure for Dungeons & Dragons 5e Basic Set." [mid levels]
"BG 9: An adventure for Dungeons & Dragons 5e Basic Set." [mid levels]
"BG 10: An adventure for Dungeons & Dragons 5e Basic Set." [high levels]
"SG 8: An adventure for Dungeons & Dragons 5e" [mid levels]
"SG 9: An adventure for Dungeons & Dragons 5e" [high levels]
"SG 10: An adventure for Dungeons & Dragons 5e" [high levels]
"AG 2: An adventure for Dungeons & Dragons 5e: Advanced" [mid levels]
"AG 3: An adventure for Dungeons & Dragons 5e: Advanced" [high levels]
1.5 years after initial release...
"Dungeons & Dragons 5th edition: Basic's Legends": This is the equivalent of the "Companion" boxed set for the Basic Game, covering levels 16-30. Boxed set with PHB and DMG each with [yet further] expanded rules, options, powers, maybe a few additional classes.
"Dungeons & Dragons 5th edition: Unearthed Arcana": This is the "standard" game release, hard bound book including a couple of new classes or races (if there's anything left), spells, powers, and any DMing options that have yet to be covered or have surfaced (in Dragon articles or wherever, from the initial releases).
"Dungeons & Dragons 5th edition: Advanced Modules Compendium": This is the "advanced" game release, hard bound book including a full array of additional rules' options and dials (anything that hasn't already been covered or come up since the first Advanced release). None of this is mandatory unless you want to play an "all advanced" game. ALL of it is optional for addition to the Basic or Standard games.
"Campaign Codex 3: Eberron for Dungeons & Dragons 5e.": This is the "standard" game release, hard bound book including all setting relevant things for the Eberron campaign setting.
"Campaign Codex 4: Planescape for Dungeons & Dragons 5e.": This is the "standard" game release, hard bound book including all setting relevant things for the Planescape campaign setting.
"Campaign Codex 5: Dragonlance for Dungeons & Dragons 5e.": This is the "standard" game release, hard bound book including all setting relevant things for the Dragonlance campaign setting.
Possssibly, come out with a full campaign/adventure path/whatever its called these days: mega-module adventure story that takes you through, say, 10 levels or so. Starting at level whatever and going to level whatever. As the first of this sort of releases for 5e, I'd start with level 1 and go to level 10. Others/further can be made for things like "levels 5-20" or "3-15" or whatever.
Gage reactions and interest for continuing produced/printed adventure modules. If people want 'em, keep making them. Or offer downloadable PDF ones online (which all of the above printed ones should be available as, without art, at maybe half the price).7
Go from there...but shouldn't be difficult to figure what else to do/is wanted once you're into the 2nd year.