The team keeps coming apart. Lorna's rescue in the Savage Land ends with Zaladane stealing her powers, and Alex isn't able to prevent it.
Then the Siege Perilous takes him out of the life he knows. When he turns up again, he's a Genoshan magistrate.
That is a hell of a place to put a former X-Man. Genosha turns mutants into tools for the state, and now Alex is wearing its uniform and helping enforce its orders.
X-Tinction Agenda uses that against everybody who knows him. His friends don't get to start with a comfortable explanation. They get Havok on the other side of an attack.
His lost memories matter, and so does his eventual recovery of them during the conflict. Once he knows who he is, keeping that knowledge from the enemy becomes useful. It isn't a genuine conversion to everything Genosha stands for.
The team keeps coming apart. Lorna's rescue in the Savage Land ends with Zaladane stealing her powers, and Alex isn't able to prevent it.
· Comics / Marvel / X-Men