Both FFXV and KH3 are skipping PGW and I really doubt they'll push Star Ocean 5 in the West just yet. KH2.8 just got a trailer so I don't think it'll be around either, so SE Japan needs something besides World of Final Fantasy (which will probably be there) and Dragon Quest Heroes (post-launch promo) to have a good PGW showing. They may go for NiER or Setsuna, but they may also drop a new game announcement: FFXIIHD would fit that slot wonderfully. But we'll have to wait and see.
Then we have Jump Festa, where both FFXV (quasi-confirmed) and KH2.8 (JF is stapled venue for KH games) have a fair chance at being shown. They may also go for it, but again, I feel like the announcement may be kept to celebrate the game's 10th anniversary next year.