I read an article that says the size of the booth shows the title isn't as important cause the space dedicated to it isn't really all that big compared to some of the other booths.

It would be nice to see some real info for Versus/Agito but chances are SE will stick to their word and not speak about them in detail til the press conference in January. I'm guessing its either an early look at KH3DS, or something that's been kept in the dark for awhile. Maybe it's a project for the 3DS.