Square Enix to announce a new game at Jump Festa?

Games, anime and manga convention Jump Festa is set to kick off next week in Tokyo, Japan. Square Enix will be there. The publisher has just released a floor map showing where their booths will be located on the show floor, and among those booths is a mysterious and unmarked one. They do the “???” thing. That says ‘new game’ to me. 

Andria Sang links us to the above map and guesses that it won’t be a “Nomura joint,” as those are usually grouped together. Everything I’d expect to be at the show seems to be listed above already. I’m totally blank — I’ve got nothing.

Any guesses to what this mystery booth might hold?