It's going to be STAR WARS (it's probably this one, because, EA, the company that owns the rights to STAR WARS video games as of right now, said they are marketing/licensing out the IP to companies, and that A LOT of STAR WARS video games are on the horizon; with mention of them starting E3 2016) or Marvel, calling it now.
Koei teased somehwat recently about a BIG partnership with a large western IP, and that Omega Force would more than likely be working on it. So…yeah. Put money on that.