Green Lantern: Beware My Power is a 2022 American superhero animated film based on DC Comics featuring the John Stewart incarnation of Green Lantern, produced by Warner Bros. Animation and distributed by Warner Bros. Home Entertainment. It is the overall 48th installment in the DC Universe Animated Original Movies, and the fifth film set in the "Tomorrowverse" continuity which began with Superman: Man of Tomorrow. The film is directed by Jeff Wamester, from a script by John Semper and Ernie Altbacker, and stars Aldis Hodge and Jimmi Simpson. In the film, Marine veteran John Stewart is chosen to become a member of the Green Lantern Corps following the apparent death of Hal Jordan, leading Stewart to be caught in the middle of a Rannian-Thanagarian war, and aided by Justice League member Green Arrow and Thanagarian warrior Shayera Hol.

The film contains elements (such as Parallax taking over Hal Jordan) from several DC Comics storylines including the 1994 storyline Emerald Twilight written by Ron Marz, the 1995 storyline Zero Hour: Crisis in Time! written by Dan Jurgens, and the 2005 storyline Rann-Thanagar War written by Dave Gibbons.