In this alternate-reality tale, a baby is sent from Krypton to Earth—but it's Zod's son. He's replaced Jor-el's DNA with his own. In the present, a bearded Superman (who looks like Zod) is teamed with a vampiric Batman and a red-haired Wonder Woman. Like Superman, they are completely different characters. Wonder Woman is Berka, an Eternal, not an Amazonia
The team massacres some terrorists and then the public views them as the same. Then, other potential heroes are being killed. Ray Palmer (The Atom) and Silas Stone and his son, Victor (Cyborg) are slain by robotic-looking creatures. Victor Friez is being framed. And it's being made to look like the Justice League is responsible.
This is an interesting tale and one of the better DC animated movies from the past few years. It's surprising who the real villain turns out to be, a very underutilized character. Highly recommended.