There are rumors that X-Men: Dark Phoenix could start shooting as early as next month and there have been virtually no casting announcements. That doesn't bode well for a movie that is due out next November and we don't know anything about it. We can expect some confirmations in the next couple of weeks but, as for now, we might have one confirmation. Will Traval, best known as Will Simpson aka Nuke from Jessica Jones, posted a tweet that seems to confirm that he has joined the cast of the X-Men movie. The tweet is in no way a confirmation that Traval is being added to the cast and there haven't been any official announcements from 20th Century Fox. So this is still just a rumor until we know something one way or another but it's more information than we've had before.
As for what role Traval could be playing we honestly have no idea. As we said we know nothing about this movie. There have been some rumors that they could be doing some of the cosmic stuff from the Dark Phoenix story line but nothing concrete. We don't even have a director yet with only rumors that Simon Kinberg, longtime producer of the X-Men series, would be making his directorial debut.
X-Men: Dark Phoenix will be released on November 2, 2018.