Justice League Film Series

Justice League is a series of superhero films directed by Zack Snyder in the DC Cinematic Universe.

Justice League
The first Justice League movie featured seven members in the league. They were Superman, Batman, Wonder Woman, Flash (Barry Allen), Green Lantern (John Stewart), Aquaman, and Cyborg. General John Swanwick/Martian Manhunter acts as the League's commander. The Justice League has to defeat the malevolent artificial intelligence Brainiac after he is released by Lex Luthor.

Justice League: Invasion
The second film in the series is Justice League: Invasion. The film introduces four new members of the Justice League: Green Lantern (Hal Jordan), Shazam, Green Arrow, and Black Canary. The League will be called into action again when a New God from Apokolips known as Darkseid attempts to conquer Earth.

Justice League: Reign of Doom
The third film in the series is Justice League: Reign of Doom. The film introduces three new mebers: Red Arrow, Hawkgirl, and Wally West, who is replacing Barry Allen as The Flash. The League will have to go up against Vandal Savage and the Legion of Doom. The Legion of Doom consists of Lex Luthor, Bizarro, The Joker, Circe, Mirror Master, Sinestro, Black Manta, Black Adam, and Deathstroke.

Grayson
While it's technically not a Justice League film, Grayson features several members of the Justice League and makes the bridge between Reign of Doom and the future Justice League films.

Future
After Reign of Doom and Grayson, the Justice League will be slowly reassmbling without the backup of ARGUS. Most of the original members of the Justice League will be moving on and their proteges will be taking up their mentors' mantles. It is likely that Trigon will appear as the main antagonist of the fourth Justice League film.