I'm know Frog God Games are looking at some retro coverings to fifth, and I think this was one of the top of the list. But it'll still be a while.
Edit: and the actual campaign setting is due to Kickstarter soon. All of the newer books cover snippets of areas, as well as having an adventure in it.
I've underlined the upcoming campaign setting, this list is from one of their recent releases
GENERAL RESOURCES
Swords & Wizardry Complete S&W
The Tome of Horrors Complete PF, S&W
Tome of Horrors 4 PF, S&W
Tome of Adventure Design
Monstrosities S&W
Bill Webb's Book of Dirty Tricks
Razor Coast: Fire as She Bears PF
Book of Lost Spells 5e
Fifth Edition Foes 5e
The Tome of Blighted Horrors* 5e, PF, S&W
Book of Alchemy* 5e, PF, S&W
THE LOST LANDS
Rappan Athuk PF, S&W
Rappan Athuk Expansions Vol. I PF, S&W
The Slumbering Tsar Saga PF, S&W
The Black Monastery PF, S&W
Cyclopean Deeps Vol. I PF, S&W
Cyclopean Deeps Vol. II PF, S&W
Razor Coast PF, S&W
Razor Coast: Heart of the Razor PF, S&W
Razor Coast: Freebooter's Guide to the Razor Coast PF, S&W
LL0: The Lost Lands Campaign Setting* 5e, PF, S&W
LL1: Stoneheart Valley PF, S&W
LL2: The Lost City of Barakus PF, S&W
LL3: Sword of Air PF, S&W
LL4: Cults of the Sundered Kingdoms PF, S&W
LL5: Borderland Provinces 5e, PF, S&W
LL6: The Northlands Saga Complete PF, S&W
LL7: The Blight 5e, PF, S&W
LL8: Bard's Gate 5e, PF, S&W
LL9: Adventures in the Borderland Provinces 5e, PF, S&W
QUESTS OF DOOM
Quests of Doom (Vol. 1) 5e
Quests of Doom (Vol. 2) 5e
Quests of Doom (includes the 5e Vol. 1 and 2, but for PF and S&W only) PF, S&W
Quests of Doom 2 5e
Quests of Doom 3 5e, S&W
Quests of Doom 4* 5e, PF, S&W
PERILOUS VISTAS
Dead Man's Chest (pdf only) PF
Dunes of Desolation PF
Fields of Blood PF
Mountains of Madness* PF
Marshes of Malice* PF
Other Products from Frog God Games You can find these product lines and more at our website, froggodgames.com, and on the shelves of many retail game stores. Superscripts indicate the available game systems: “PF” means the Pathfinder Roleplaying Game, “5e” means Fifth Edition, and “S&W” means Swords & Wizardry. If there is no superscript it means that it is not specific to a single rule system.
* (forthcoming from Frog God Games)