X-Men characters such as Storm, Cyclops and Jean Grey may be played by younger stars in X-Men: Apocalypse, the film's writer and producer Simon Kinberg has revealed.
The third instalment of the latest trilogy takes place 20 years before the first X-Men film, which means that the characters, played by Halle Berry, James Marsden and Famke Jannsen respectively, would have to be recast.
"If we included some of the original X-Men like Storm, Jean (Grey) and Scott (Summers/Cyclops) and others in Apocalypse, then yes, we would have to recast them because Apocalypse takes place a good 20 years before X-Men One," he told Yahoo! News.
"It'd be very hard to do, because Halle, Famke and Jimmy and others have done such wonderful jobs of bringing those characters to life, and we identify those actors with those parts now. So it would be a tall task."
Simon heaped praise on the younger generation of actors introduced in 2011's X-Men: First Class, including James McAvoy and Michael Fassbender, taking on the roles played by Sir Ian McKellen and Sir Patrick Stewart.
"But I also would have said before First Class that there would be no way that we could find actors who can stand alongside Ian McKellan and Patrick Stewart, and I think we managed to with Michael and James, finding their own interpretations of the characters and not doing an impersonation," he continued.
"If some of those characters appear in the movie, we would (recast) but we will see."
X-Men: Apocalypse, due out in 2016, will focus largely on the new generation of X-Men including Mystique (Jennifer Lawrence) and Beast (Nicholas Hoult).
"In Apocalypse, it will really to be the continuation of the 'past' of Days Of Future Past," Simon added.