We even have an action-packed teaser trailer for the upcoming show:

Before the latest casting news, we already had some exciting voice actors signed on. Voice actors include Steven Yeun, J.K. Simmons, Zachary Quinto, Sandra Oh, Seth Rogen, Gillian Jacobs, Andrew Rannells, Zazie Beetz, Mark Hamill, Walton Goggins, Jason Mantzoukas, Mae Whitman, Chris Diamantopoulos, Melise, Kevin Michael Richardson, Grey Griffin, and Max Burkholder.

J.K. Simmons will play Omni-Man in season one. Having previously voiced fan-favorite Tenzin in Avatar spinoff The Legend of Korra, Simmons is no stranger to voice acting, animated shows. So too is Mark Hamill, who is (aside from Star Wars) well known for his portrayal of Joker.

Most recently, Deadline announced several additional voice actors, sending huge talent to the show. Oscar-winner Mahershala Ali will voice Titan, while Clancy Brown will portray Damien Darkblood. Hamilton star Jonathan Groff will play Rick Sheridan. More actors include Nicole Byer as Vanessa & Fiona, Jeffrey Donovan as Machine Head, Jon Hamm as Steve, Djimon Hounsou as Martian Emperor, and Ezra Miller as DA Sinclair.