One of the first projects announced for James Gunn's upcoming DC Universe cinematic reboot was a Swamp Thing movie. Set to be directed by James Mangold, the movie will be the first film for the title creature in decades. At the same time, it's not his only recent adaptation, with a short-lived TV series paving the way for its success.
Source:https://www.cbr.com/the-dcu-already-has-the-perfect-swamp-thing-blueprint/