Casting on Guardians of the Galaxy writer/director James Gunn’s upcoming DC film The Suicide Squad continues, and a key role has been filled. Per Deadline, comedian Steve Agee will provide the voice for the super-villain humanoid King Shark in the upcoming film. Agee is an incredibly funny comedian with a knack for stealing scenes who’s popped up in everything from New Girl to Superstore to You’re the Worst. This isn’t his first time working with Gunn, as he played the Ravager Gef in Gunn’s Marvel sequel Guardians of the Galaxy Vol. 2. King …