Mainly the egos of White and McMahon clashing, I'd imagine. They have very different ideas of how to run a company. But now its the same company. Ari Emmanuel isn't exactly a small ego, either. The treatment of the booked talent is probably going to be an issue. Again, they treat them very differently in either camp. It's a real clash of styles, product and management that I don't see being all that harmonious - and that's an understatement