Trapped in a pocket universe, surviving Earths face annihilation by the Anti-Monitor. Time shatters, bringing past heroes to aid Justice League against the epitome of evil. Their sacrifice may lead to victory.
In the near future, aliens have invaded Earth and declared a galactic war resulting in thousands of human casualties. To save Earth, a team of four teenage astronauts brave the alien wilderness of a distant planet to stop an assassin from changing the course of history forever.