"It's not based on the series. Honestly, we went through a lot of titles - Underoos Of Ultron. None of them landed. Underoos would've been better because of the alliteration. But Age of Ultron really stuck. We were like, 'It's a book, but we're still going to use it.' We're not going to see Pym and all the accoutrements. Ultron is more central to the Avengers as they are. But we will explore the idea of lineage, because he was created by us and we've got to own that... Then we have the Scarlet Witch and Quicksilver and I think that's plenty, because Quicksilver and Scarlet Witch did not begin their time as friends of the Avengers, so there's going to be a lot of, well, conflict."
When the director says "us," when speaking of who created Ultron, it's possible he may be confirming a casting call from earlier this week, which revealed that Tony Stark brought Ultron to life. However, the "us" could imply that other Avengers and/or S.H.I.E.L.D. may have a hand in the creation of this super villain.
Since the rights to both Quicksilver and Scarlet Witch are retained by both Marvel Studios and Fox, some fans wondered about a possible crossover between the X-Men universe and this franchise, although the director shot down those rumors.
"That's not the plan. It would be cool but I think right now I already have a ton of very talented actors in my movie playing a ton of characters, and I'm about to add a few more. So I'm not like, 'How can we get more licensed characters because I want to kill myself and make a nine-hour movie.'"
He also spoke about Thanos, who is popping up next in the Marvel Phase Two ensemble Guardians of the Galaxy, although he won't be the primary villain.
"We have to stay grounded. It's part of what makes the Marvel universe click - their relationship to the real world. It's science-fiction, and Thanos is not out of the mix, but Thanos was never meant to be the next villain. He's always been the overlord of villainy & darkness."
Avengers: Age of Ultron comes to theaters May 1st, 2015 and stars Aaron Taylor-Johnson, Scarlett Johansson, Robert Downey Jr., Elizabeth Olsen, Chris Hemsworth, Chris Evans, Cobie Smulders, Jeremy Renner. The film is directed by Joss Whedon.