Justice League: Crisis on Infinite Earths Part Three gets a trailer

Now fully revealed as the ultimate threat to existence, the Anti-Monitor wages an unrelenting attack on the surviving Earths that struggle for survival in a pocket universe. On the planets that remain, even time itself is shattered, and heroes from the past join the Justice League and their rag-tag allies against the epitome of evil.

But as they make their last stand, will the sacrifice of these superheroes be enough to save us all?