Question: Which cartoon premiering on May 26, 2013 features Liam O'Brien as a voice actor.
Sentence (from "Liam O'Brien"): In cartoons, he voices in shows such as "Star Wars Rebels", "", "Avengers Assemble", "Wolverine and the X-Men", and "Hulk and the Agents of S.M.A.S.H.".
Relevant evidence: Yes