On the heels of a newly-released featurette about the latest additions to Marvel Studios' Avengers this morning, Buzzfeed Entertainment today debut a lengthy feature highlighting the work of Quicksilver and Scarlet Witch actors Aaron Taylor-Johnson and Elizabeth Olsen in "Avengers: Age of Ultron" and how the film will be a direct and different take on the heroes.

Accompanied by three new photos of the renegade siblings and insight from director Joss Whedon and studio head Kevin Feige, the story digs deeper into the reasoning for including the comic book mutants in the film in an all-new role.

"The first movie was, 'Punch!' 'I punch you back!' 'I punch you back!'" Whedon explained. "You can only do that so many times before you start to think, This is dulllllllllll."

To switch up the action on screen, the director enlisted the super speedster and his sister whose powers got more definition for the first time. "She can make you have a nightmare, is one way of putting it," Whedon said. "'Trip balls,' would be another one. That was something I very much wanted, because it meant we could spend a little time inside the Avengers' heads - either their past or their impressions of what's going on, or their fears, or all of the above. And confronting that is very debilitating for the Avengers, but it's also kind of revelatory. That's not the movie I made last time. I could never have done that."

Tellingly, Whedon also spoke to the change in the characters' background that would pull them out of the world of the X-Men (controlled as they are by 20th Century Fox) and into a non-mutant role in the Marvel Cinematic Universe. "It allowed me to tie their origin into the mythos of this universe more effectively," he said. "It's more useful to me than introducing the idea of mutants."

As for Quicksilver's character making a last-minute appearance in Bryan Singer's "X-Men: Days of Future Past," both Whedon and Feige praised the visuals of that interpretation while also stressing the vast difference in versions. Though Whedon added. "I think there's room for more than one Quicksilver. But yeah, I was never thrilled."

The director also noted that "Age of Ultron" will ultimately be one-minute shorter than his first Avengers film and that much of the back story for his new characters was left on the cutting room floor. "They don't like America, and they don't like the Avengers," he said. "We only touch on it briefly - there was more. When the movie was an hour longer, everything got explained a lot...The Avengers are like a world power, and not everybody's on board with the Avengers coming in and starting fights, even in the name of justice. So you need that dissenting voice, and you need to understand it and sympathize with it."

As for their own parts, Taylor-Johnson stressed the close connection the characters have on screen despite their differences. "We're very much yin and yang," he said. "I'm more physical, and she's more psychological."

"Avengers: Age of Ultron" premieres on May 1.