What Mysterious New Character Just Joined The Airbender Reshoots?

Aasif Mandvi, who plays Commander Zhao on M. Night Shyamalan's Airbender twittered this interesting tidbit: "Great seeing "The Last Airbender" gang again for reshoots and one new cast member who has joined us in the eleventh hour." Reshoots? New Character?

[via MTV]