SCPM: There will be quite a few day-one releases next week like Fran Bow, Grandia II Anniversary Edition, Evoland 2, Satellite Reign, and Crookz. But something else major is pretty much confirmed to be coming. :D
The-Business: Monday
Grandia II Anniversary Edition
Tuesday
Crookz - The Big Heist
Evoland 2
Pillars of Eternity's extension The White March - Part I
Thursday
Fran Bow
Friday
Satellite Reign
If all 3 Fallout games got remastered, they could be released here - but it's also possible that they will be only released somewhere else.
Age of Decadence plans to release
in October.
So 6-9 slots are already in use.
I don't think we should assume that every game coming out next week is going to get a release stream. Unless I'm mistaken, plenty of games that come out on GOG don't get release streams at all, let alone on the exact day of their release.
Regardless of how many release streams there are for next week's big event, we know that there's going to be one because a member of the GOG staff already told us about it in the Trine 3 release thread.