While we already know a number of familiar faces will be reprising their DC roles in Man of Tomorrow, James Gunn's sequel to 2025's Superman, fans are most intrigued by the possibility of new cast members. Earlier this week, rumors began swirling that Scream and Scooby-Doo actor Matthew Lillard would be the DC Universe's Barry Allen. The theory made its way to Gunn, who gave a definitive answer on the topic.