Fan Casting The Green Lantern Redo

I've decided to go back and redo some of my old DC Cinematic Multiverse Movies. Please refrain from suggesting actors for roles they've already had. From the DC Cinematic Multiverse comes a new the story of a new hero. John Stewart is a struggling architect who chosen to become a member of the Green Lantern Corps. He must work to overcome past trauma to battle a tyrannical rogue Lantern and the embodiment of fear itself.