Grime (https://www.grimegame.com/) was announced on the frontpage roughly one hour ago as "Coming soon", with a news article and embedded video. Now it has disappeared again. Strange.

Any theories?

Sorry, I don't know where else to post this.

Probably just pulled the trigger accidentally and the announcement is going to reappear when it's supposed to go live.

Depends if the Witchaven releases are source port or dosbox, considering that the steam pages don't mention anything about new features I'm guessing it's the former.

I'm getting the same feeling I got before the releases of Batman and Horizon: Zero Dawn. Back there was also a period without any major releases. It looks like that tends to happen when they're winding up for something big.

The Epic Store has leaked NIS America's upcoming localizations for the Trails series:

The Legend of Heroes: Trails from Zero (Fall/Autumn 2022)
The Legend of Heroes: Trails to Azure (2023)
The Legend of Heroes: Trails into Reverie (2023)
The Legend of Nayuta: Boundless Trails (2023)

More info will likely be revealed on a Falcom 40th Anniversary Celebration hosted by NISA. It will go live in about 9 hours and we will know then whether those games will be confirmed for GOG, or whether they will be Epic exclusives.

American Hero, a previously-unfinished game will be resurrected by Ziggurat for PC and consoles this summer. GOG is not directly mentioned, but a release is very likely, what with Ziggurat having brought quite a few games recently.
https://www.youtube.com/watch?v=hZrsB943_bc

Already listed:

https://www.gog.com/game/american_hero

Welp, guess I should be searching the store more thoroughly next time.

'The Sinking City' is back on steam.... Again.

So maybe ...

Ultimate ADOM: Caverns of Chaos, the follow-up to 2015's ADOM (Ancient Domains Of Mystery) "will see its full release version 1.0 on August 25, 2021".
On GoG as well, the same day even?

Don't get your hopes up. It took some years after the steam release for ADOM to reach GOG.
Since the first one is already here it's very likely that UA will could reach this store. The main problem is that the game appears to have plenty of issues and it has a mixed rating on steam. I wonder if - in its present state - it'd even pass GOG's "curation".

Ziggurat's Retro First Friday releases for July will be the puzzle games Zyconix and Revelation. GOG doesn't always get the Retro First Friday games, so it's still up in the air whether we'll see these particular games here or not.
https://drive.google.com/drive/folders/17Z2H5oqhLQW8gmQZ8bn76tvYIrrneXG3

The developer of Sovereign Syndicate (Victorian steampunk RPG) has posted on the GOG forums expressing interest in selling the game here: https://www.gog.com/forum/general/sovereign_syndicate_20132015_shadowrun_but_its_victorian_steampunk/post11


I also emailed the developer of Rising Lords (turn-base strategy with card and board game elements) and they answered that it might be released on GOG in 2022:

This is an extreme vague sign, but it seems Ziggurat has S.C.A.R.S. license. Maybe one day we'll see it here.

https://twitter.com/playziggurat/status/1420784446387654659

And where is integer scaling?...