DISCLAIMER: I do not own the Avengers or the Justice League.

Several weeks had passed since the destruction of the core Kryptonite, and Lex Luthor was in prison where he belonged. Nick Fury had declared a truce, but not surprisingly, he showed no remorse for initiating the conflict. Batman had made a peace agreement with Tony Stark, stating that the two teams worked towards a similar goal, and therefore would be on the same side.

Superman and Hulk had thrown Luthor's salvaged spaceship back into outer space, where Superman's telescopic vision saw it explode on impact with the Sun. Directly after they had done this, Hulk had randomly punched Superman across the field, simply because he felt like it.

Superman and Batman stood at the Watchtower, looking down at the Earth. Flash suddenly appeared next to them.
"Hey, guys, Cyborg just got a message from Tony Stark. Some guy called Thanos has appeared. The Avengers want our help dealing with him. From Thor's description, I'd say he's pretty much another Darkseid."

Superman nodded. "Tell them I'll be there soon."
Flash zipped off, before returning directly after.
"They're waiting for you."

Superman flew from the Watchtower, Batman close behind in a spacecraft. Superman wasn't looking forward to it, but he was ready to help combat this Thanos.