Mystique in X Men
Mystique is a shape shifter from Marvel comic X-MenMarvel

A lot has been added and altered in the X-Men storyline, however, one thing remains constant, which is the love-hate relationship between Professor Xavier and his friend-turned nemesis Erik aka Magneto. X-Men: Apocalypse, the latest instalment of the mutant saga aims at exploring this relationship against a larger evil threatening humankind.

Spoiler alert: Do not proceed if you are yet to watched the film

In a new video, released by 20th Century Fox – an integral thread of the plot – the blue-skinned Raven aka Mystique is shown tracing her way back home. Jennifer Lawrence, who reprises her role in the new X-Men movie has steered clear of Professor Xavier's path for some time now, choosing the hot-minded Magneto's propaganda over X's rationale.

So, if the shape-shifter – who earlier had a clear difference of opinion with her original mentor – decides to return home, there are bound to be strong reasons. In the new clip, when Xavier welcomes Raven home, she disagrees to say, "This isn't my home," and adds that she barely recognises the place.

Moreover, Raven is not ecstatic about Xavier's ambitious plans with the mutant's school either, especially when he tells her of turning the school for gifted children into a university to tutor both mutants and humans. From the teaser released by the studio, it seems that the former member of team X still holds hostile feelings towards humans, "I really believed we can change them [humans]," she informs the wheel-chair bound professor to throw light on the real threats that loom ahead.

She tells the professor, "Just because there's not a war doesn't mean there's peace..." The official synopsis of the movie hints at the rise of an original mutant from Marvel's X-Men universe, Apocalypse.

Immortal and invincible, the powerful antagonistic character has an agenda: "To cleanse mankind and create a new world order, over which he will reign." And for the purpose he will make use of another great mutant, "a disheartened Magneto", thus explaining the cause of Raven's return to Xavier's school.

"As the fate of the Earth hangs in the balance, Raven with the help of Professor X must lead a team of young X-Men to stop their greatest nemesis and save mankind from complete destruction," reads the synopsis.

Directed by Bryan Singer, X-Men: Apocalypse is likely to see the return of Hugh Jackman as the Wolverine. The unmistakable glimpse of the Adamantium claw in the last shot of a trailer hints at the same. The movie is slated to hit theatres in the US on 27 May, it has already be released in the UK.