Cyclops tricks the Avengers and the X-Men escape Utopia thanks to Illyana.
Cap sends the Avengers to various locations to look for Hope. Wolvie and Cap take a walk to compare half baked strategies and well this happens...
At first I was going to bitch about Rachel being Cyclops' mole in Logan's School, but then I remembered when Wolvie tried to kill her when she was the Phoenix's host. Which if that's what they end up using to justify her siding with Cyke is actually a) good writing and B) an astonishing nod to continuity.
If they believe the Phoenix's arrival means a rebirth for them, then it makes sense for most (if not all) of the mutants to side with the other mutants. But I don't get how the Phoenix arriving equates jump starting mutant baby births.
Cap and Logan both have flawed strategies about what to do about the Phoenix but at least their reactions to it make (some) sense.
Cyclops' doesn't. It's not like the Phoenix has been so helpful to him and his in the past. If anything he should be the first one trying to hide Hope and plotting a way to reroute/destroy it.