The special project close to his heart IS BG&E2. He said earlier that the first game would feature way more planets to explore and much more things that were pretty much impossible to do, but as new technologies rises, he would like to explore those lost/cuts ideas that were close to his heart at that time.
I could see Beyond Good and Evil 2 being a thing; Shenmue 3, FFVII Remake and Last Guardian all happened, so I could see BG&E2, Crash, and World Ends with You 2 being things announced at E3 2016.