Maybe a localization of Natsuiro High School? Marvelous Europe said they were interested in it on their Twitter.
Was wracking my brain trying to think what this could be, and this has been the best guess so far but I still don't think it's really a fighting/wrestling game.
Would be surprising too since it's not even out in Japan yet and it's not a Marvelous title (so they'd have to negotiate with D3 Publisher, which takes time), but it's the only PS3/PS4 title I can think of.
Only other PS3/PS4 game which I can think of which involves fighting is... well... Yakuza >.<
(Unless this is just referring to the fact that they have a PS3 fighting/wrestling game AND a PS4 fighting/wrestling game. Like maybe Onechanbara Z for PS3 and Onechanbara Z2 for PS4, or something).
Aw, no Corpse Party Blood Drive, Luminous Arc Infinity or IA/VT? Hope them not being in E3 doesn't mean XSEED skips those. I want to see them plus Tokyo Xanadu, Popolocrois early next year.
I reckon Luminous Arc has a chance, since they have brought across Lord of Magna.
Personally, I'd love to see Net High, but it's probably a bit early for that.