Sorry, Arachne, I was going to say thank you in my previous response to your answer.
We hadn't seen much of Warren until that preview panel of issue 6. If Warren does appear in Prisoner X, he may be a villain. Some one has to be with the villains.
But it might be the other Dani-Lock virus infected characters who are the spoiler characters. They may be the ones holding Dani and the others prisoner.
Archangel may not even appear in Age of X-Man. Cannonball is in the first Uncanny story, but he will not be part of Age of X-Man. Could be the same with Archangel.
Even without knowing what is going on, that picture makes me happy, especially seeing Warren in his Archangel form. Now I can stop complaining about Archangel potentially dying, for a little time at least
I think that he leaves the Horseman early. Angel was shown abandoning his teammates in Uncanny while talking to someone. It could have been X, but I doubt that X would have Warren Abandon his teammates in a fight. I think he flies off to join whoever turns him into a Horseman.
I like your idea That it might be Warren's ability to change into Archangel that frees him.
Just going off of the cover that shows Psylocke fighting Angel, you might be right that Warren is freed by Psylocke or Jean. I still would rather that he free himself this time.
Or maybe he really is an alternate reality character.
That was going to be my guess. That would be a great idea.
Edit: I don't know what is going on, but I'm having a hard time multi posting.
Edit 2: I think that I got them all this time.