Originally Posted by
PrezValentine
I'm pretty sure it IS Xavier, but Soule wants to show his death and subsequent time in the Astral Plane had actual consequences. Chuck spent what felt like centuries fighting the Shadow King, having to give everything to not allow him to win. This might have honed his skills to the ultimate level, but also might have changed his personality a lot. X being the actual Xavier works, because he's gone through too much to come out unchanged. He's a very different man now, but we'll have to see how much it affected what he was and what he'll be.