Prey with better enemy variety would have been a perfect game. I hope they can 1 up themselves, because, while I was dissapointed in some of their newer stuff, Disholored 1 and Prey were some of the all time greatest.
Also, Immersive sim is an absolutely shit name and I wish that something else would stick as a label. Immersive sim works better for, like, powerwash simulator or euro truck simulater.
Edit: also, mgs3 remake would be awesome with some immersive sim elements. the premise of the game is perfect for it and og mgs3 seemed like it wanted to do something like that but was limited by the ps2 hardware.