Involvement, perhaps. But they're not responsible for the game like so many people seem to be claiming. Even if you were to say that makes them responsible, I can guaranty you that even Nintendo wouldn't care if the game they sponsored copied off another game. It's the fault of the developer, not the company. If you're even assuming that their intentions are sinister.While I agree with the rest of your post, 3D Dot Game Heroes is a PS3 exclusive for a reason. While it is not developed or published by sony, it still has an exclusivity deal with them, so sony DOES have some involvement.
Thanks for pointing that out, by the way. I did not know that. ^^ I just don't feel it effects things much.