The Mummudrai?

Some very interesting shots play out as we hear Wade crack wise about coming to save the MCU as “Marvel Jesus.” The first is a brief shot of a mysterious bald figure, as we see them looking out over a scene of destruction. Yes, X-Men films are usually involving a particular famous bald mutant, but there is another: there’s been rumors swirling that Emma Corrin will play a version of Cassandra Nova in Deadpool & Wolverine, and this certainly looks like it could be her.
Introduced in the first arc of Grant Morrison and Frank Quietley’s New X-Men in 2001, Cassandra Nova is a wildly powerful psychic mutant, and the twin sister of Charles Xavier himself. Killed in the womb by Charles with his burgeoning psychic power, Cassandra was his “mummudrai,” an evil twisted spiritual reflection of Charles that, having picked up some of Charles’ power herself, managed to survive being stillborn after she attempted to kill her twin brother in-utero. Spending years plotting revenge against him, Cassandra made her presence known to the X-Men and Charles at large again by engaging in the genocidal slaughter of 16 million mutants on the island of Genosha, a safe haven for mutantkind established by Magneto in the wake of the nation’s previous human-led, anti-mutant apartheid state.