Justice League

While apprehending Killer Frost in the commission of a heist, Jason is severely wounded by Lex Luthor, the Joker, and Cheetah. While still recovering, he goes to aid the captive members of the Justice League. Upon freeing the members of the League, he joins the battle against the Injustice League. After this victory, Firestorm is drafted into the League by Batman.

During the team's encounter with the planet destroying villain Starbreaker and the black-ops team the Shadow Cabinet, Jason eventually faces Carl Sands, AKA Shadow Thief, the villain who killed Ronnie Raymond and inadvertently caused Jason's transformation into Firestorm. Sands mocks Jason for being an unworthy successor and nearly kills him like he did his predecessor, but Jason rejects the villain's insinuation that he is inferior, and emerges victorious. Jason instead uses his abilities to seal Sands' mouth shut with duct tape, preventing him from utilizing the shadows within his body, thus rendering him powerless. He later assists Icon and the rest of the Justice League in the final battle with Starbreaker.

After this, Jason plays a minor role in the mini-series Justice League: Cry for Justice. A short time later, Firestorm is seen helping search for survivors alongside Animal Man and Starfire after Star City is destroyed by Prometheus.