Actor Daniel Cudmore was spotted in Montreal earlier this year around the time that X-Men: Dark Phoenix was filming. This led many fans to speculate that Cudmore would be appearing in the film, leading to more scathing online comments that Fox was messing up their X-Men continuity by having two actors portraying Colossus at the same time.
However a new Tweet from Cudmore confirms that he is returning to the X-Men franchise for Dark Phoenix just maybe not as Colossus. Could he be portraying another square fade X-Men character...namely Gladiator, the ultra-powerful Superman-esque leader of the Shi'ar Imperial Guard?
A fan asked him to specify which character he's playing but naturally, Cudmore declined to specify. At the very least, we can likely take this as confirmation that he's in the film.