To be fair, I don't think Sony, as a corporation, expected anything. I'd be willing to bet money that, until the papers were filed, most of the execs at Sony had never heard of White Wolf. Much as we might like to think otherwise, the RPG industry barely registers as a blip on the radar to most entertainment folks.
If there was some plagiarism--and I think it's likely, but not certain, that there was--the guilty party would be a screenwriter or three, not the execs. The worst they're guilty of is, I think, ignorance.
It doesn't change the fact that, as captains of the ship, they're legally responsible for the actions of their crew, and if WW wins (or Sony decides to settle), it's the execs who will be held accountable. Nevertheless, I really don't think there was any ill intent on the part of most of the execs. (And it's rare for me to say that, given my opinion of large corporations in general.) I think they just didn't realize what it was they had.