Deadpool 2 teased future X-Men Avengers crossover? Did you spot the Easter Egg?

The Merc with a Mouth’s sequel was chock-full of pop culture references and Easter Eggs.

And now one’s been spotted that alludes to an X-Men Avengers crossover.

Heroic Hollywood points out that during the third act of Deadpool 2, there are banners inside Essex House – Firefist’s orphanage – that feature the text “M-Day”.

This refers to House of M, a comic crossover that brought the X-Men and Avengers together.

It’s certainly not an implausible hint at the future of the Marvel Cinematic Universe, especially as Disney have now acquired the rights of Fox, who own the X-Men.

Another Easter Egg here is the name of the orphanage for Mutant Rehabilitation called Essex House.

Fans will recognised the name Essex as that of Nathaniel Essex aka Mister Sinister.

Like the staff at Essex House he enjoys experimenting on mutants.

Screen Rant pointed out that when a member of staff at Essex House is shot in the head, the bullet-hole leaves a wounds in the shape of a diamond.

This is the trademark insignia of Mister Sinister, and often the way he’s revealed in the comics as having been in disguise.

But Deadpool 2 isn’t the first time he’s been referenced in an X-Men movie.

In the end credits sequence of X-Men Apocalypse a suitcase containing vials of Wolverine’s blood is shown labelled Essex Corp.

These vials were used to create Wolverine’s female clone, X-23, who appeared in Logan last year.

In the comics Mister Sinister is a scientist from the 19th century who is given immortality by Apocalypse – a recent villain in the movies – after joining him as one of his Four Horsemen.

So perhaps Mister Sinister will be popping up in future X-Men movies.