Thief 4 is already a known, though. I'm really fucking hoping it's on demo at E3.
Anyway, when I think of their bigger Western IPs, at least stuff like DXHR and Thief 4, I think of Eidos - even though Squeenix owns them. Even so, the Western stuff doesn't get as much coverage over there as does JP stuff. They own smaller companies than that like Ankama and (I think) n-Space, but I doubt their games would warrant a tease like whatever this reveal is. Same goes for social games. :P