Cassandra Nova

Cassandra Nova would represent a very different kind of threat to anything seen before in the X-Men movies, as she is neither a mutant nor a human – and she’s also completely intangible.

She’s a member of the parasitic species of beings known as the Mummudrai, who are born bodiless on the astral plane and are essentially inadvertently created by the negative psionic energies on the physical plane – in essence, they are dark reflections of humanity.

Occasionally, members of the Mummudrai can crossover to the physical plane – and, given that they are capable of copying the DNA of living beings, this can make them extremely dangerous.

Most infamously, in the comic books, Cassandra Nova copied the DNA of Charles Xavier, becoming a powerful, bodiless telepath and caused havoc. She could create a body for herself, possess other living beings or operate whilst completely intangible – and that would make for a really interesting movie.