DC's Legends of Tomorrow

When heroes alone are not enough... the world needs legends. Having seen the future, Rip Hunter will desperately try to prevent certain events from happening, by time-traveling; Now Rip Hunter is tasked with assembling a desperate group of heroes and villains to confront an unstoppable threat - not only is the planet at stake, but our timeline itself. The Great Question being asked here is can this ragtag team defeat an immortal threat unlike anything they have ever known?