Haller, a.k.a. the title character Legion, may be the most powerful mutant ever encountered in his world – or it may be all in his head.
He has a very complicated mind to untangle in Haller’s and will need to deliver a convincing performance to make Legion not only compelling but coherent.
One clip, titled ‘Begin,’ hints at some kind of twisted experiment and also the start of Haller understanding how real his powers are.
Life is extra challenging for mutants in the X-Men universe in general, but several mutant identities within one mind present an entirely different set of challenges.