Will Arnett

William Emerson Arnett is a Canadian-American actor, voice actor, and comedian who is best known for his roles as George Oscar "Gob" Bluth II in the 2006 Fox/Netflix series Arrested Development and also plays the titular main character BoJack Horseman on the series of the same name.

In Teen Titans Go! to the Movies he will be playing an unknown role but it's possible that it's probably Batman because of his work on the Warner Animation Group films The LEGO Movie and ''The LEGO Batman Movie. ''