this is what i think is that every body is saying that seraph might come back with his wings and that rarebit said that some one is going to have a change and is going to be dangerous so when i saw this:
XiaoDian: Who stands on the Exiles side?
General: The devil.
Seraph just pop right in my head, it would look cool to see him like that and if it do happn then every one have a chance to fight him too.