I don't know what to expect, Hashimoto said something among the lines of "come to Tokyo and you'll see!", but they aren't precisely the most trustworthy guys around.
I want to be optimistic, though, and say that it'll at least show up, even if it's just 5 new seconds
BTW, something I've seen on Twitter:
https://twitter.com/theVGO/status/504749831131500546
According to the replies, it looks like it's a game by S-E and that we'll know mid September (that is, around TGS). It might end up being nothing (or be related to other games, like XIV or KH II.5), but hey, who knows?