Stormonu
NeoGrognard
I think I'd go with 4 books a year - one a quarter. Personally, I'd like to see a setting book around January (great way to start a new campaign for the year) - preferably a new world rather than a rehashed campaign world, an adventure anthology about April, some sort of DM's toolbox for July (Monster books if I had my way, especially if they included the monsters from the January & April book) and a player's book in October (possibly with PC versions of the races from the previous books, with errata for the time that's gone by).
For the anniversary, I'd do a "Play your way" D&D and release a DMG, PHB & MM "collector's" edition for BECMI*, 1E, 2E, 3.5E, 4E, 5E & Modern D20 (with softcover add-ons for Gamma World, Boot Hill, Masque of the Red Death, Top Secret & Star Frontiers).
Also a "collector's" boxed set for as many of the campaigns I could, updated to 5E (or better yet, systemless!) - Al-Qadim, Birthright, Council of Wyrms, Dark Sun, Dragonlance, Eberron, Ghostwalk, Greyhawk, Forgotten Realms, Hollow World, Jakandor, Mystara, Planescape, Ravenloft, Savage Baronies, and Spelljammer. With this many campaign worlds, I'd dole out the work to most of these worlds to various passionate freelancer's with the option to continue producing additional content for these worlds for at least 1 year (negotiate up to maybe 5), so long as they meet company standards. The idea would be that the box set would be big enough to contain a systemless softcover travelogue of the world, a couple poster maps, a softbound book with version-specific rules and space to hold a campaign-length adventure book (the latter something that can be done down the road).
In house, I'd have a reworked Karu-Tur, Maztica and Horde drawn up and released (and possibly an African campaign set developed), decoupled from the Forgotten Realms and from real-world history, and released like the box sets above. They'd then be opened on the DM's guild for others to write adventures, add-ons and the like.
*actually, the Rules Cyclopedia
For the anniversary, I'd do a "Play your way" D&D and release a DMG, PHB & MM "collector's" edition for BECMI*, 1E, 2E, 3.5E, 4E, 5E & Modern D20 (with softcover add-ons for Gamma World, Boot Hill, Masque of the Red Death, Top Secret & Star Frontiers).
Also a "collector's" boxed set for as many of the campaigns I could, updated to 5E (or better yet, systemless!) - Al-Qadim, Birthright, Council of Wyrms, Dark Sun, Dragonlance, Eberron, Ghostwalk, Greyhawk, Forgotten Realms, Hollow World, Jakandor, Mystara, Planescape, Ravenloft, Savage Baronies, and Spelljammer. With this many campaign worlds, I'd dole out the work to most of these worlds to various passionate freelancer's with the option to continue producing additional content for these worlds for at least 1 year (negotiate up to maybe 5), so long as they meet company standards. The idea would be that the box set would be big enough to contain a systemless softcover travelogue of the world, a couple poster maps, a softbound book with version-specific rules and space to hold a campaign-length adventure book (the latter something that can be done down the road).
In house, I'd have a reworked Karu-Tur, Maztica and Horde drawn up and released (and possibly an African campaign set developed), decoupled from the Forgotten Realms and from real-world history, and released like the box sets above. They'd then be opened on the DM's guild for others to write adventures, add-ons and the like.
*actually, the Rules Cyclopedia