I'm wondering something...
I understand why the Phoenix would take Cyclops and Emma Frost (see Phoenix: Endsong) as hosts, but why Colossus, Magik and Namor? The Phoenix Force has a tendency to attach itself to either extremely powerful mutants (omega level to be exact) or anyone who is tied to Jean Grey. While you could argue that Colossus does have some ties to her what about the other two?
The only five other characters to be almost as close to her as Cyclops was were the First Class X-Men (Professor X, Angel, Beast and Iceman) and Wolverine. It makes sense for Emma to become a host of the force. Given their present status on the AVX story, it makes sense for Xavier and Logan to be benched of the opportunity to control 1/5 of this god-like creature. So wouldn't it make more sense for Beast, Angel and Iceman be the chosen ones?
You could argue that Angel is not himself at the moment, Beast is presently an Avenger and Iceman was taking care of JGSHL... but c'mon! This makes way more sense.