Over the weekend, Reynolds posted a photo of himself in Deadpool costume, lying outside the X-Mansion, home of the X-Men.
Deadpool 2 reaches cinemas 1 June, 2018, X-Men: Dark Phoenix coming 2 November, 2018 and spin-off The New Mutants on 13 April 2018.
They will join Reynolds, Brolin (playing the character Cable), and Zazi Beats, who will portray Domino.
With work underway on the sequel — Josh Brolin hitting the gym and new cast members being announced — Reynolds has already begun teasing the upcoming film.