The addition of Quicksilver to the cast sparked wide discussion over the direction of the character who is also slated to appear in X-Men: Days of Future Past
(2014). Quicksilver had been discussed previously as a potential character in both X-Men: The Last Stand
(2006) and The Avengers
(2012), but legal complexities over the license to the character resulted in his omission from both films. However, in May 2013 both Marvel and Fox Studios announced a resolution to the previous legal issues, and that Quicksilver would appear in this film as well as an X-Men sequel, though under certain parameters: no allusion to his relations to the X-Men or Magneto (the character’s father) can be made in an “Avengers” film, and no reference to Quicksilver’s membership in the Avengers can be made in an “X-Men” film; the rights agreement between Fox and Marvel even goes so far as to stipulate the character cannot be referred to as a “mutant” in any Marvel film. Additionally, the day after Fox announcedEvan Peters
as Quicksilver, Marvel and Fox entered into a legal standoff over provisions of the rights agreement for the character, including the issue of whether Peters would be allowed to portray Quicksilver in any other film outside the “X-Men” franchise, necessitating a second actor to play Quicksilver in any Marvel film, resulting in two different versions of the same character appearing in two competing film series.