Technically speaking, the title of the The Avengers sequel is Avengers: Age of Ultron, which we like a whole lot better than Avengers 2 or Return of Avengers or even Avengers Again: The Avengening. Now, it may seem a little presumptuous to put the name of the bad guy in the title. After all, Loki was totally shut out of the title for the first movie. Trust us, though—Whedon and company made the right call with this one.
As we talk all about over in Ultron's "Cast" entry, dude is a complex set of circuitry. He's as low-down and evil as any villain our heroes have faced, yet he's also a deep thinker who, when it comes right down to it, firmly believes that he's doing the right thing. As he puts it when he first shows up and crashes the team's victory party,
Ultron: I'm here to help.
Of course, ending humanity is not cool, no matter how helpful it might seem to be. But in the Avengers' attempts to stop Ultron, we learn more about his motivations to force human beings to evolve into a more noble species. It's a little unclear how a meteor strike might accomplish that, but Ultron's doesn't strike us as a robot that's big on details.
He'd rather preach the gospel of improvement—both ours and his own. To that end, for much of the movie he's after a new body, tellingly one that looks human, but with a core of advanced technologies.
It's really not. Depending on how you want to measure it, you could argue that humanity's merger with technology has already begun. (Ever seen how folks interact with their smartphones these days?) Still, in terms of the plot, the "Age of Ultron" doesn't last very long. He's born, he gets some vibranium, he launches Sokovia into the air, and then he dies—or at least disappears in a flash of Vision-ray. In a broader sense, though, you might say that we're living in the Age of Ultron at this very moment. This really is a title that makes you say, "Hmm."