The time travel plot of this is pretty bad. Stopping Superman from being raised on Earth would not stop Bruce Wayne's parents from being killed and thus would not stop him from becoming Batman. It would not stop Wonder Wiman from leaving her island. It would not stop Barry Allen from getting struck by lightning and becoming The Flash. It MIGHT lead to events that would stop Cyborg from being created. It MIGHT lead to events that would either stop Arthur Curry from going to Atlantis or coming back to the surface once he got there. It also would not stop dozens of other superheroes from being born or created.
That being said, the animation and voice acting were very well done.
That being said, the animation and voice acting were very well done.