Marvel will probably stay Marvel, Rodders, it's the brand they've bought, so the films might be a bit odd for a while. Marvel gained its reputation and held it for an incredibly long time, but others have taken on the role of proper adult-orientated entertainment (and, no, I don't mean porn) in print, like Dark Horse and Image (I assume they're still around in one form or another).
I don't necessarily fear Disney as an entity, though I hate the idea of any single ethic gaining a monopoly on entertainment output. Things are, surely, bad enough.