I think the question is... would Warner keep the exclusitivity/contractual rights to the games? I'm ok letting Warner own Harry Potter, if HP games can only be played on the console I'm trying to improve the ecosystem of. Basically I take-on the wages of the game dev teams, and purchase myself an exclusive game series in one fell swoop.The thing is (according to rumors), is that they won't be selling their IPs, just the studios. If true, that's a bad deal.
But if Warner are just trying to offload bodies, or pull a fast one by having Harry Potter Game X on PS, and HP Game Y on Xbox by a different team, I'd be pissed.