Quite a few people around here started shipping 'Ramsputin' when the
X-Men Kissing cover was released showing them kissing, from memory Fokken was quite the fan of it.
It could really add an interesting dynamic and I feel like it'd be great for all the interconnected relationships between Kitty, Colossus, Magik and Doug.
I was quite disappointed when I heard Cypher wasn't going to be in the movie, but given its going for the horror movie kind of vibe, I'm sure if they put him in they'd probably just kill him off for effect. So I'm glad in a way.
Mephisto/Amara was a bit strange, but so was Empath/Amara so idk. A proper Empath redemption arc could be good. You could have him start to date Firestar and follow Amara's reaction to that.