I don't think that's a bad thing really and MoS was the last CEOs final film and the guy was the "take it one movie at a time" type. You really can't blame them either because of how GL went.
Plus I think Marvel just spoiled us by advertising the Avengers in all their films, hell IM2 can be a SHIELD film with a dude in an iron suit. It's almost as bad the Audi and Acura product placements in their films.
I mean Nolans trilogy didn't have any of that outside of the Joker card in the end of Begins but they didn't really have a plan to make TDK with Joker at that point, they also didn't plan TDKR and I believe Nolan would have wanted Joker to return to finish off the trilogy.
Don't get me wrong, I'd love it but with rumors of the MoS sequel and all these castings that'll make a cameo, people are already bitching that they are rushing it when they could be in the film for 3 seconds.