Fan Casting Green Lantern: Emerald Knights (2014)

Believing that The Guardians of the universe are self righteous and can't see through their mistakes, Sinestro betrays the republic and goes rogue by deciding to be a Yellow Lantern. Meanwhile, Hal and John prove to Sinestro that he doesn't have to do this and there's still a chance for him and The Guardians. But, now that Sinestro is too far gone, Hal must prove his moral righteousness as a Lantern Knight and defeat Sinestro.