That’s a big ensemble for one film, and so Rogue might be more of a cameo role than anything else.
The only worry is whether or not the already crowded film will then sideline Rogue, especially in light of the way Jubilee (Lana Condor) was sidelined in Apocalypse.
It would be very surprising if they did not re-introduce Rogue in the newer X Men films.
Hopefully, the creative team will have learned from previous films’ mistakes and will not sideline any characters in favor of others.