Scarlett Johansson and Chris Evans preview 'The Avengers: Age of Ultron'

Filming on The Avengers: Age of Ultron is underway, which means fans will have no shortage of updates from the cast and crew of Joss Whedon's superhero sequel. Chris Evans, who plays Captain America, and Scarlett Johansson, who plays Black Widow, have provided the two latest previews.

"I think all of these characters have dark pasts," she told The Huffington Post. "A lot of us are superheroes that didn't choose to be. My character is a mercenary to begin with and was sort of put into the Widow program. She's had a dark past, and she's just beginning to discover how her past affects her when we see her in Cap 2. I think she's had to dehumanize in a way, obviously, as anyone in that position does just to be able to accomplish the things that she's had to. But now she's like, 'Wow, I actually have nightmares about this stuff.' She's starting to realize, Wow, I'm a product of what I've done in some way. And I think, in Avengers 2, it's about time that our past comes back to haunt us in some way-all of us, I think, in one way or another.

"I think the audience is ready for that. These characters' relationships become even muckier. Nothing's getting cleaned up and tied up in a big, red shiny bow in Avengers 2. It's complex, and the universe is expanding even more. More characters are coming in, but that only feels like it enriches the story. Joss has made room in a very, very impressive way for those new characters to come in, to be introduced. This is not the kind of rehashing of what you've already seen, but just in a different setting. It's the progression of these characters. And everything's in real time, you know, it's been three or four years. The world as we know it is the world as we know it. It's the next step - the next level." 

Evans, meanwhile, talked to Inquirer about the experience of working on the set:

"It's nice to see those guys again-the whole crew. It's nice to know that you are making something good. I have been part of plenty of movies where you start filming and you [wonder], is this going to be good? It's not easy to make good movies. If it were, there would be a lot more of them. There's a real sense of comfort and confidence not just in Joss [Whedon], but in the whole Marvel clan. A sense of comfort that what you are working on and what you are giving so much of yourself [to] is going to pay you back with a quality film." 

What do you expect from Age of Ultron? Let us know in the comments below.