We already know that filming for Justice League: Part 1 will begin in the first quarter of 2016, now it looks like we may have gotten a production date, plot synopsis and villain.
Justice League: Part 1 will be Directed by Zack Snyder and at the moment we know will star Henry Cavill (Clark Kent/Superman), Ben Affleck (Bruce Wayne/Batman), Gal Gadot (Diana Prince/Wonder Woman), Ezra Miller (Barry Allen/The Flash) and Ray Fisher (Victor Stone/Cyborg) and I assume Amy Adams, Chris Pine and Jeremy Irons will also make appearances as Lois Lane, Steve Trevor and Alfred.
In the description it is revealed that Darkseid will be the main villain of the story, which we speculate could mean he will appear at the end of Batman V Superman: Dawn of Justice:
The world’s greatest heroes are assembled to form the Justice League, to combat a threat beyond each individual’s capabilities. The story involves Darkseid planning the destruction of Earth by blasting it with a ray that’ll move Apokolips into the Earth’s place.
Judging from what we’ve seen from the site previously, such as with the production start date of Wonder Woman, which they had it listed for November 23rd, which we know that wasn’t completely accurate. Other words, please take with a grain of salt.