Ben 10 / Generator Rex: Heroes United

As the Joker visits Metropolis with a plan to kill Superman for Lex Luthor, Batman pursues the clown to Superman's turf.

Death is coming. Worse than death: oblivion. Not just for our Earth, but for everyone, everywhere, in every universe! Against this ultimate destruction, the mysterious Monitor has gathered the greatest team of Super Heroes ever assembled. But what can the combined might of Superman, Wonder Woman, Batman, The Flash, Green Lantern and hundreds of Super Heroes from multiple Earths even do to save all of reality from an unstoppable antimatter armageddon?!

The Joker is back with a vengeance, and Neo-Gotham's Dark Knight, Terry McGinnis, needs answers as he stands alone to face the old Gotham's most infamous Clown Prince of Crime.

The Justice League faces a powerful new threat — the Fatal Five! Superman, Batman and Wonder Woman seek answers as the time-traveling trio of Mano, Persuader and Tharok terrorize Metropolis in search of budding Green Lantern, Jessica Cruz. With her unwilling help, they aim to free remaining Fatal Five members Emerald Empress and Validus to carry out their sinister plan. But the Justice League has also discovered an ally from another time in the peculiar Star Boy — brimming with volatile power, could he be the key to thwarting the Fatal Five? An epic battle against ultimate evil awaits!