"Dear powers that be, if you are looking for someone to play John Stewart, I humbly submit my name," Brown wrote on Twitter. He signed off with the valediction "Namaste" and the hashtag "#GreenLanternCorps."
In the comics, Stewart is a former Marine who is called upon to serve as one of the intergalactic do-gooders known as Green Lanterns and outfitted with a ring that bestows immense power. Introduced in 1971, the character is notable for being one of the first black superheroes in mainstream comics.