So far, Geoff's noted that the likes of Call of Duty: Black Ops 6, Monster Hunter Wilds, Marvel Rivals, Dune: Awakening, Indiana Jones and the Great Circle, and Civilization 7 will all be present. We also know that Metaphor: ReFantazio, Phantom Blade Zero, and Crimson Desert will be there — at least in demo form.
But let's face it, "new game announcements" — as per Geoff's Twitter post on the subject — could mean anything. Typically, Gamescom isn't the place for gigantic reveals — it's always been more of an updates show, because of its proximity to events that take place earlier in the summer.
Indeed, 2023's Gamescom Opening Night Live had a heavy emphasis on providing new information for games that had already been announced. We're assuming that'll still be the case this year, but with a few surprises sprinkled in.