If we were to accept the Razer story - I could see that when they subjected Puck to the process of adamantium, that Razer would break free and decimate everyone - and Puck would regain conscious, an older man, now with adamantium, on a quest to find and recapture Razer...
I could see this. Especially with Aurora's frequently fractured mental state; it'd fit - because I believe it helped break Jean's own mental state (between that, and the manipulation by Mastermind).