Trailer Park John Stewart Takes Up the Ring in Green Lantern: Beware My Power (Trailer) May 5, 2022 John Stewart becomes the newest Green Lantern and has to quickly learn how to control his new powers as he teams with Green Arrow and Hawkgirl to stop an intergalactic war that has devasted the Green Lantern Corps in the upcoming DC Animated movie, Green Lantern: Beware My Power.