Well, there is a reason for Disney leaving the Aliens / Predator series alone over at DH. If Disney picks up too many companies and literally corners the market on comics and other forms of entertainment media, they could be accused of monopolizing the industry and could face anti-trust litigation. I would be fairly sure that this would happen if they picked up DC comics / Warner Brothers... If you have everything under one umbrella, the government steps in and breaks up the party so there can be competition.