After being incarcerated for nearly destroying the world and the Justice League under Brainiac's control, Lex escapes and is contacted by an unusual ally who makes him a proposal he can't refuse. Meanwhile, the Justice League set up their new Watchtowers on Earth while searching for the escaped villain.
Shayera agrees to meet with Carter Hall, an archaeologist, who believes he's also Thanagarian and married to Shayera in a past life. Meanwhile, Batman begins to suspect Carter is not what he appears to be.
Stargirl, S.T.R.I.P.E., Supergirl and Green Lantern are mysteriously transported into the Earth's core were they help liberate Skartaris from Deimos control, and meet some familiar villains in the process.
Wonder Woman seeks out to protect the remains of an Viking Prince from Legion agents who seeks it for reverse engineering and invunerability powers using Science. Meanwhile J'onn leaves the Justice League to better understand humanity.
During a museum event held in Flash's honor, a gang of the speedster's rogue gallery pays him a visit; Mirror Master, The Trickster, Captain Cold, and Captain Boomerang. With the help of Orion and Batman, Flash must stop them at all costs.
The spirit of a circus acrobat arises from the dead, seeking help from Superman, Wonder Woman and Batman to retrieve a stolen soul of a temple of mystic monks.
An out-of-control soldier by the name of General Eiling seeks to prove that the world needs protection from superpowers. Enhancing himself with an experimental World War II formula, he heads for Metropolis, Green Arrow leads a team of seven non-powered Justice League members, including Shining Knight and Crimson Avenger, in a battle they hope to win.
A mystical accident transfers both Lex into The Flash's body and The Flash into Lex's body... Now it's up to The Flash (Lex) to convince the league that he is who he says he is...
Due to financial difficulties, Roulette turns to Luthor for support, who inadvertently comes up with the idea of organizing an all female fights tournament made up of... Leaguers.
After Supergirl is kidnapped and taken to the 31st century, she meets the new Legion of Super Heroes and is told that after she helps them, she is destined never to return from her final mission.
Shadow Thief and Hawkman return as Carter Hall tries to further explain his and Shayara's love so long ago.
Lex Luthor confronts the returning Gorilla Grood as his attempts to restore Brainiac nears completion, the effort paves the way however for the return of one of the darkest opposing forces in the League's history.
There's fire in the streets of Metropolis, the Daily Planet lies in ruins, the League and the Legion stand side by side, as Superman comes face to face with his greatest opponent...