Thanks to EW we have even more information on Avengers: Age of Ultron. They talked to Joss Whedon, Robert Downey Jr., Aaron Johnson, and Elizabeth Olsen about certain aspects of the film, such as The Twins and Vision. Whedon started off by saying that the two siblings aren't introduced as good guys.
"They’re on Team Ultron, which makes things really hard for the Avengers because all of sudden they’re dealing with powers that they’re not used to.
"With the [first] Avengers, everybody pretty much had the power of being able to punch somebody. And now we have a woman who can get inside your head and move objects, and a boy that can move faster than anything, and a robot [Ultron] who can self-replicate and is out of his mind. So all of sudden, it’s a darker, weirder, tougher world that they’re living in."
Johnson talked about his character Quicksilver, who is basically an outcast from Eastern Europe along with his sister Scarlet Witch. They could basically care less if the world burns.
“They’re gypsies in a way. They’re romani. They’re sort of like travelers… There’s a lot of clashing. He’s quick tempered. He gets agitated. He’s impatient. But he’s super protective… They’re very yin-and-yang in that twin sense. In his power, he’s physical and she’s psychological. My character is very much on the frontline, but he can be quite emotional. You see this beautiful tenderness between them.”
Johnson went on to compare their versions of the characters to the comics saying:
“When you look in the comic books, you see a lot of the time that [Wanda is] always sort of mothering him. He’s like the father figure and she’s like the mother figure. Emotionally, she can stabilize him, and he protects her physically, vice-versa. So they have this beautiful connection and it’s kind of them against the world.”
Olsen then chimed in about her character and the powers she has:
“The reason she’s so special is because she has such a vast amount of knowledge that she’s unable to learn how to control it. No one taught her how to control it properly. So it gets the best of her. It’s not that she’s mentally insane, it’s just that she’s just overly stimulated. And she can connect to this world and parallel worlds at the same time, and parallel times…. In the comics, every time you see an image of them, they’re always holding each other’s hand and looking over each other’s shoulder. They’re always so close, it’s almost uncomfortable. Aaron and I have been playing a little bit with those kinds of images just for ourselves.”
I'm so glad these two characters play a big part of this story. It sounds like they really nailed down who they are. Then we have The Vision, who is played by Paul Bettany, and Whedon tread lightly when talking about him saying, “It’s not coincidence,” in regards to Bettany playing both J.A.R.V.I.S. and Vision, “And I’m not going to tell you any more about The Vision.” Downey Jr. on the other hand was more open about it:
“Things only happen arbitrarily in Kevin Feige’s Marvel universe by mistake, and I think he’s maybe made two mistakes and they weren’t really in the movies. They were more in like the easter eggs early on. Things that he didn’t have as much final say over but would nowadays.”
The actor was then asked to clarify that it isn't just by some accident that the voice of J.A.R.V.I.S. is now playing The Vision, to which he replied:
“Yeah, I don’t think Kevin would let that happen. Again, it’s like if you think about the five different ways that [The Vision] could come together, this one’s definitely the most interesting of the five. I was running other scenarios and I’ve seen it progress over drafts. It was just kind of really good, right from the start.”
There's a lot of great stuff here open for speculation! I love how open everyone at Marvel is about talking about these movies. It's going to be so cool to see how this story plays out.