I don't why they would let Disney do this I mean adult swim/cartoon network has always done most popular anime such as Naruto.
[as] didn't have Naruto, Cartoon Network did. Disney also didn't buy the rights to Naruto Shippuden: Viz is dubbing and doing the release of it just as they did with Naruto. Disney has the TV rights. As for why CN didn't pick it up . . . well, they had already passed on Dragon Ball Kai so most fans think that anime is done on their networok.