I'm okay with DD being a separate entity from the Marvel films for now. Sony and FOX own(?) the rights to some heavy hitters who're big enough to stand on their own, if done correctly.
Not everything has to tie back into the Avengers' grand storyline or the larger Marvel Universe. Would it be nice if it did? I'm not so sure it would, so why force it?
Eventually, SURE, I'd like to see Marvel take control, but let's wait for the Spider-Man 4 fallout first.
(HE'S NO TOBEY MAGUIRE)
The rights will be an easier sell after that stinker flops. Marvel produced Spidey 5 opens with Mary-Jane, as played by Kirsten Dunst, waking from the horrible dream that was Spidey 4. Maguire, of course, will be in the shower. I'm calling it.