Well, if this is true I hope they play it fairly safe. By that I mean, don't break what isn't broken.
Alien Isolation 2 should be to Alien Isolation what Resident Evil 2 was to Resident Evil. The same gameplay, but refined in the areas it needs, given a nice new coat of paint, expanded slightly, and a new narrative that expands on what we were left with at the end of the previous adventure.
So, new and varied locations, more items to craft, a few more weapons to the roster(though very much in keeping with the notion that you are surviving, not fighting), more variations on puzzles. I think they should maybe try to implement some loaders into the game for puzzles along those lines (moving heavy objects out of the game path, etc...)