Big-screen Avengers writer and director Joss Whedon appeared on Friday's Late Night with Jimmy Fallon to promote his adaptation of Shakespeare's Much Ado About Nothing. Along the way, he also discussed 2015's Avengers sequel, specifically his reasons for including Scarlet Witch and Quicksilver, previously confirmed by Whedon to be in the current version of the script.
"Their powers are very visually interesting," Whedon said. "One of the problems I had on the first one was everybody basically had punch-y powers,"
Whedon also acknowledged a fondness for them due to their prominent roles in comics he read as a kid, calling them "great mainstays in the Avengers."
The appearance came one day after Fox's X-Men: Days of Future Past director Bryan Singer announced on Twitter that Quicksilver would appear in that movie (out in 2014), played by actor Evan Peters. Due to their significant history in both X-Men and Avengers comics, Quicksilver and Scarlet Witch have been said by Marvel Studios president of production Kevin Feige to be a special case, where either Fox or Marvel could use the characters in a live-action feature.
The news led to speculation among observers as to what prompted the Pietro Maximoff double-dip from the competing studios, with HitFix projecting it to be "a legally-negotiated stand-off in which we'll get two totally different versions of one character."
Here's the clip, including Fallon's casting suggestions for Scarlet Witch and Quicksilver: