I'm posting this here for the sake of getting a discussion going but its something I haven't seen mentioned yet as possibility:
Originally Posted by Upset Spideyfan
Why not use Gene Khan or Zhang Tong, Tem Borjigin or any of the other Mandarin aliases while simply dropping the Mandarin title.
I was re-reading Director of SHIELD/Haunted the other day and it seems to me that they can still totally do this story with very little modification.
His motivation in that story (bringing about an apocalypse to bring about a new better world) is still totally usable, Extremis has been introduced and there's no reason it can't be a plot point going forward. As far as I can see there's really nothing that Iron Man 3 did that prevents them from still actualizing the Mandarin character as portrayed in that story.