Legends of Tomorrow will feature dangerous magical creatures as the main villains in Season 4.
Warner Bros. Television has revealed the synopsis for the upcoming season of Legends of Tomorrow. It seems the DC team will be facing the consequences of letting time crumble in order to help defeat Mallus.
The Legends softened the barrier between worlds, allowing the mythical “Fugitives” from fairytales and legends to invade Earth. John Constantine will be joining and helping the team to defeat this new threat, “which is now returning to our world in droves and making a real mess of things,” according to WB.
The DC show has promoted Season 3 villain Nora Darhk to series regular, with Matt Ryan portraying John Constantine.
Source: IGN.com Legends of Tomorrow: Season 4 Villains Revealed