The blurring of boundaries arises as the rights to the character of Quicksilver are owned by both Marvel and 20th Century Fox, leading to a strange overlap of franchises.
It was announced recently that Bryan Singer had cast the character to appear in the forthcoming 'X-Men: Days of Future Past' project, which makes perfect sense when you consider that Quicksilver, along with his twin sister, is the offspring of Magneto.
However only Fox own the rights to Magneto, meaning that Marvel can’t mention Quicksilver's parentage, while Fox can’t ever link him and his sibling to the Avengers.
Even more confusingly, Singer has cast Evan Peters as the super-fast superhero (his name is the clue to his super powers), who was also in the first 'Kick Ass' movie.
Meanwhile Whedon's project is also negotiating the return of Robert Downey Jr. as Iron Man, Chris Hemsworth as Thor, Chris Evans as Captain America, Mark Ruffalo as the Hulk and Jeremy Renner as Hawkeye.
Johnson, who recently starred in Oliver Stone's 'Savages' and 'Anna Karenina,' will next be seen in 'Kick Ass 2' in August. He's also currently filming the latest incarnation of monster flick, 'Godzilla.'