In the pages of Forever Evil, the Crime Syndicate of Earth-3 -- the evil opposites of Earth-New 52's greatest heroes (plus an evil opposite of Alfred Pennyworth) -- have conquered the world!
The master villains have come up with a particularly brilliant plan to rid themselves of the DC Universe's heroes, trapping them all in sinister tie-in comics well beyond the pages of the main series. If you're wondering who's where, you can find most of the Justice Leaguers trapped in a weird prison in the pages of Justice League of America; Steve Trevor and his military team are in Forever Evil: ARGUS; the Teen Titans got sent into the future in the pages of Teen Titans; and all the magic guys are embroiled in their own 18-part tie-in crossover "Forever Evil: Blight", which is, amazingly, going to end up being much longer than Forever Evil itself will be. They don't call the Crime Syndicate villains for nothing.
It looks like the only forces left to challenge the Syndicate now are a handful of free-thinking bad-guys under the leadership of Lex Luthor, and Batman and his remaining Justice League allies, Catwoman and Cyborg. If they can put aside their differences and work together, they just might have a chance at saving the world from the clutches of the Crime Syndicate.