Scott NEEDS one of his own flesh & blood with him on his team, to prevent him from going batshit insane. Emma isn't exactly the best candidate for helping him keep his head on his shoulders, these days. So either Nate Grey or Rachel would be great.
Also interesting would be if he & Cable combined their teams and resources for awhile. They're both fugitives on the run from SHIELD and Avengers. And they have a similar ideology and way of doing things, great bond between them etc. So why not team up ? Temporarily at least. Would also be some hilarious interaction between Colossus, Magik & Domino. The potential for fun stuff happening if those 2 teams combine is limitless.
And I would love it if we have someone like Silver Samurai join Cyke's teams, just for the luls.