DC Heroes & Villains Fest runs on select nights from June 15 through Aug. 4 at Six Flags Magic Mountain. (Courtesy of Six Flags)

The leaders of the Justice League of America will face off against key members of the Suicide Squad when Six Flags Magic Mountain hosts a summer festival of good and evil with a cast of superheroes and supervillains.

DC Heroes & Villains Fest will run on Saturday and Sunday nights from June 15 through August 4 at the Valencia amusement park with character appearances, live shows, themed food, event merchandise and DC-themed rides and attractions.

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The showdown of DC Comics heroes versus villains will take place each weekend night from 5-9 p.m in the DC Universe-themed land at Magic Mountain.

The line-up of DC characters on hand for meet-and-greet photo opportunities will include Superman, Batman, Wonder Woman, Flash, Supergirl, Joker, Harley Quinn and Catwoman.

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Each night of the festival will kick off with a DC Super Hero Cavalcade starring Superman and his fellow Justice Leaguers.

The trouble starts each evening during a celebration for Batman hosted by the Mayor of Gotham City that is interrupted by the Joker and his League of Anarchy.