From Comic book.com:
Zack Snyder unites the seven in the newest trailer for Zack Snyder’s Justice League. In the four-hour and R-rated director’s cut premiering March 18 on the HBO Max streaming service, the death of Superman (Henry Cavill) inspires Batman (Ben Affleck) to assemble a team of metahumans capable of protecting the planet from Steppenwolf (Ciarán Hinds) and an army of parademons. United with allies Wonder Woman (Gal Gadot), Aquaman (Jason Momoa), Cyborg (Ray Fisher), and the Flash (Ezra Miller), Batman and the newly-formed Justice League come together to prevent an apocalyptic future under the rule of Apokolips warlord Darkseid (Ray Porter).
“I got to say I never really thought it would happen. I’d been living with the prospect that it would never happen and fine with it,” Snyder said in a recent interview about the Snyder Cut, an entirely new version of the superhero ensemble that released into theaters in 2017. “I’ll be honest. I’d made peace with the fact that this was the world I was going to be in. It was going to be a situation where this was a movie that I never really finished. I have my cut of it here at the house, and if you want to see when you’re over, you can check it out, but that’s pretty much it.”