Disney bought Marvel as a business. It's going to work the same as Pixar: Marvel will do its own projects, but with a bigger budget and financial backing, and it'll have the disney logo next to the marvel logo. So no worries, guys.
This will mean more money for movies and publishing, but it shouldn't affect the comics at all. Because they know how temperamental we nerds can be.
What Disney's getting out of this is more money (duh, lol) and they're hoping to get more young adult men in their demographic, since they've already got little girls worshiping Disney. So to speak.
So it's a business decision, not a creative decision. I'm still keeping my ears open.. just in case.