Invincible creator Robert Kirkman has started casting for season 3 of the animated superhero series. While season 2 is yet to premiere, Kirkman revealed at New York Comic Con that season 3 is "very far along" and will feature more members of The Walking Dead cast. This connection between the two shows is not surprising, as Kirkman created both. The crossover between the casts is an exciting way to merge the two television sensations and promote both shows.