People are getting all bent out of shape over nothing. It's unlikely to have any significant impact on the comics, at least in the short term. They almost certainly bought the company for other, more lucrative exploitation. Once the current contract expires, it's almost certain they won't even negotiate with Universal for the parks, and all films will be brought in-house.
Disney is a corporation. The idea of any guiding principle to its content, good or bad, is a thing of the past. Miramax does plenty of adult-oriented, kid-inappropriate films. Even ABC Family, which sounds like it should be kiddie fare, is full of gay characters, pregnant teens, and underage drinking without the usual PSA lectures on the evils of alcohol.
If something adult gets negative press, Disney may shut it down, but other than that, if Marvel turns a profit, I doubt they could care less what the publishing arm does.
The biggest impact will probably be that Disney will probably not give a rat's ass about giving Marvel writers and editors input on the films, so the creative gestalt that produced the brilliant Iron Man film will probably fall by the wayside.
