>>43155529Definitely tons of scripts, possibly a handful of art not released in the artbook, possible information on what Chapter 3 was exactly going to be like, useful clues for if there was or wasn't going to be any more missions in Chapters 1 and 2, development information on Fox Engine, and more.
Oh, also, source code. That's always nice.
Maybe we could also get a canon bible that details a secret explanation for the game's confusing and shallow as fuck ending.