Origin Crisis was released not long ago and it brought not one but two rather challenging raids as well as two Alerts and two new solo challenges.
Raids:
Nexus of Reality - Future Batman and Future Lex Luthor vie for control of reality along with their alternate universe contemporaries (there are like 6 or 7 of each, and all have their own unique abilities). You and your group fight 5 of the alternate reality Lex's that are out-of-phase with you (they look sort of like projections). Once you defeat two, the rest flee. You then go through the Nexus to find the other three (each in their own rooms by themselves) and take them down. The final fight is the original two you beat plus the 6th Lex (he was only in the cinematic at the beginning of the first fight) show up and you have to keep them from acquiring a random artifact (Kryptonian DNA, H-Dial, Fate's Helmet, Nth Metal, etc). Each artifact has its own effect(s) that ebb and flow throughout the room.
Paradox Wave - There are 4 different side tunnels you have to defeat the boss of, then enter another zone (haven't made it that far yet) to get an artifact to help you beat the big final boss who is (oddly enough) in the first room. This is the biiiiig fight of the game at this time.
Alerts:
Brothers in Arms (hero mission) - You are sent to an alternate reality where Lex has gone back in the past to tamper with Superman's origin. You arrive in current-day Metropolis that is under the rule of Lex Luthor and his bodyguard, Superman. You fight the Lexcorp/Police, free some protesters, then fight Lex outside his office building. He flees into his office so you have to chase him inside. Once there you confront Lex again and his bodyguard: Kal El. After defeating the two of them you go back into the past of that alternate reality to find that Lex had put Red Kryptonite in the ship with Kal El before it blasted off from Krypton, thus skewing his perceptions and making him malleable to Lex's wish once he landed on Earth. You fight through the House of El's guards, finally confronting Jor El himself. Once you beat him, Batman shows up and removes the Red Kryptonite then ushers you and your group back through the time portal just before the ship takes off and Krypton explodes.
Family Reunion (hero mission) - You are sent to an alternate reality where Lex has gone back in time to tamper with Batman's origin. You arrive in current-day Gotham that is under the rule of Bruce Wayne, having been influenced through life by Lex Luthor. You defeat some thugs, some Wayntech robot peace-keepers and eventually take on Bruce in his office, all decked out in a nifty Evil Batman suit. Once he starts getting close to being beaten, Catwoman shows up to help him. After beating them both you head back in time to keep Luthor from interfering with Batman's pivotal moment. You fight your way to where the Wayne's are about to be shot by a mugger only to be interrupted by your arrival. Luthor shows up and you fight him then him and one of his uber robots to save the Waynes. At the end, you have saved the Wayne's and Batman shows up saying how he doesn't care if it screws up the future, then he sends you home.
Solo Challenges:
Test Subject #1 - You play as Bizzaro as he first frees himself from the clutches of STAR Labs then you fight your way to freedom.
The Hunt - You play as Huntress as she finally confronts the man that killed her family and tried to kill her, only to discover a startling secret...
