I have a quick question about the Marvel Cinematic Universe.
Where the hell is Ultron coming from? In that same vein, why are Quicksilver and Scarlet Witch there? There's not a whole lot of setup.
I mean, I've seen every movie that came out past Avengers, and you know, the Cosmic Cube was set up at least one film in advance.
Is it that Age of Ultron is going to be a segue into something even bigger?
The fact that the Infinity Gems have such a range of affinities and abilities makes it seem likely that they were instrumental in bestowing Quicksilver and Scarlet Witch with their powers, whether they were Inhumans or not. I think HYDRA being revealed to have come out of the woodwork and having possession of Loki's scepter was enough setup, frankly. Ultron on the other hand is, as was theorized, originally developed by Hank Pym but never put into use for unknown reasons. Tony Stark, rather than simply creating it from scratch as he did with JARVIS, takes that model and boots it up, giving it the ability to think independently enough to go all Skynet on the Avengers' asses.
Another theory is that, because the scepter was used to take over the minds of Selvig, Hawkeye and others, it is the Mind Gem, which we see Tony holding during one of the trailers, and that it will be used to give sentience (possibly among his host of other unique abilities) to the Vision android seen at the very end of the third trailer. So in that sense, this will be introducing the fourth of the six Infinity Gems. Plenty of places for the other two to be hiding in Phase 3. Also that the situation with Ultron, which was supposed to help the Avengers and then turned on them, will cause the rift that is the basis for Civil War. It will reinforce the separation in the teams that will pave the way for the new heroes, namely Doctor Strange, Black Panther and Captain Marvel, to come onto the scene to take part in the Infinity War.
The structure is there, you just have to be paying attention and care enough. It's easy for the devoted fans but I'm surprised (and gladdened) that they aren't doing more to help the casual moviegoer get into it.