When the villains flee after the battle at the zoo, Man-Bat takes flight while Killer Croc grabs onto his ankle, but his hand appears to only close next to Man-Bat's foot and not around it.
(at around 45 mins) Batman and Nightwing are seen on top of a building where they jump into a trap door. Nightwing goes down WAY before Batman but then it shows them at the bottom falling out and Batman comes out first.
Silverback calls the robot animals, "androids". That is a specific term for robots shaped like men. Considering he is defined by his intellect, Silverback ought to have known this.
When fighting Man-bat with Green Arrow, Batman says "use your sonic tip arrow, it'll scramble his radar". Bats use sonar, not radar, (which Batman of all people would know) which is what a sonic device would interfere with.
Man-Bat flies by flapping his arms/wings.
At one point, he's holding a key piece of equipment, while flapping his wings, which are now detached from his arms.