Before we get to the new universe, we have to reboot away the old one. Or, in this case, several old ones as the current "Prime" continuity for this film is really an amalgamation of various versions of DC continuity that's come before. And then Flash goes back in time and ruins everything.
Now in a fresh, New 52-inspired continuity, we pick up with our favorite, familiar heroes as they set off on their first adventure together, a battle against the evil supervillain, Darkseid. Earth is doomed.
Batman and his son, Damian (aka the newest Robin) don't exactly see eye-to-eye. They are very similar, each as headstrong as the other, so it was only a matter of time before the relationship came to blows.
Damien Wayne doesn't play well with others, a trait his father would like to see changed. So he's put on a team with other supepr-powered teens to see if they can work together for once. Probably not, though.
Deep in the bowels of a government complex lies a prison that houses the worst of the worst, super-powered villains with little in the way of conscience or morals. This crew, the Suicide Squad, is sent out to handle missions no one else can. And if they die, who cares?
When a movie has a title like this, I think we all know what's coming. Based on the comic series of the same name, this film is only going to end one way, and it won't go well for our titular character.