With Marvel’s Agents of S.H.I.E.L.D. concluding its first season this week on ABC and Guardians of the Galaxy just a few months from hitting theaters, it’s soon time for Disney and Marvel Studios to get everyone focusing on the return of Earth’s Mightiest heroes in The Avengers: Age of Ultron. The followup to the third top-grossing film of all-time sees Joss Whedon back writing and directing and is already deep into shooting at various international locations.

The first photos of the cast in costume on set performing action sequences featured Jeremy Renner back as the team’s marksman Clint Barton aka Hawkeye, fighting off imaginary CGI villains, joined by the two new additions to the franchise: Quicksilver (Aaron Taylor-Johnson) and Scarlet Witch (Elizabeth Olsen).

The “brother-sister act” appeared briefly during the mid-credits scene of Captain America: The Winter Soldier and actors Taylor-Johnson and Olsen star together in this week’s Godzilla, though in that movie they barely share any scenes together. In The Avengers 2, they’re inseparable and Whedon has added them to mix up the team dynamic. They’re some of his favorite characters from the comics, and were key members of the Ultimates (the Ultimate Marvel Comics universe version of The Avengers).

In chatting with moviefone, Olsen spoke again about the experience of shooting their first Marvel Studios movie, teasing how her powers work during action sequences.

“It’s so fun. I’m laughing all the time. The crazy thing is that it’s like, I’m throwing sh*t with my hands, that’s cuckoo! But it’s also like, We’re saving lives. And it’s very serious. There’s always that reminder that it’s very serious.”

At this point, it’s still unclear of what powers Olsen’s version of Scarlet Witch has. From interviews over the last year, dating back to before she officially joined Age of Ultron, she’s talked about playing a “messed up” character and from her own research reading the comics, she highlighted the interesting idea of being able to “communicate with paranormal things and the past and the future and other universes; like to me that’s pretty incredible! [Laughs] Like just thinking about that is amazing! To touch things and know where they’ve been, that’s crazy!”

Whedon also said at the time that Scarlet Witch can “weave spells and a little telekinesis, get inside your head,” and from our only official footage of her on screen (at the end of Captain America 2), we can only confirm that she is at least telekinetic. That’s likely not all though, since she could not only be tossing physical objects from the environment, but could be firing Hex Bolts at enemies, which are essentially spells.

In the film, Scarlet Witch will be partially out of control according to what she told Cover Media, which hints at some interesting plot points from the comics, where she’s one of the more over-powered characters who has the ability to alter probability and hence, change reality.

“My character is incredible and absolutely out of her mind. [She’s] incredibly passionate and thinks she’s in control more than she actually is. She’s stubborn and an epic woman who has not been created by a human yet.”

And according to Whedon, the new additions will “f*** with The Avengers” – whether they enlist as full-fledged members during the course of The Avengers: Age of Ultron remains to be seen, but the team is growing (see: Paul Bettany playing Vision) and some characters may not live through the film. When prodded about the possibility of officially joining the hero roster and getting their own superhero costumes, Olsen responded by stating “we’re not part of the team, so it’s not the same thing.”

Whedon does however describe the pair as “super heroes” so like the comics, we can expect their questionable pasts and/or actions to be redeemed and if not in this movie, down the road, the pair (if they both survive) will be fighting alongside Captain America, Iron Man, Hulk and Thor.

More: Marvel Plans Ahead All The Way To 2028

Captain America: The Winter Soldier is now in theaters, Guardians of the Galaxy opens August 1, 2014The Avengers: Age of Ultron on May 1, 2015, Ant-Man on July 17, 2015, Captain America 3 on May 6 2016, and unannounced films for July 8 2016 and May 5 2017.

Follow Rob on Twitter @rob_keyes for your Marvel movie and TV news!

Source: Cover Media (via FansShare), Moviefone