We may just be more excited for this version of Justice League than for the Zack Snyder version!

The movie sees Batman defend Gotham City against the notorious Joker.

In the trailer below, we are introduced to Robin, who Batman aka Bruce Wayne adopts unintentionally.

The cast lined up so far includes Will Arnett in the titular role of Batman (reprising his character from The Lego Movie), Michael Cera as Robin/Dick Grayson, and Zach Galifianakis as the Joker.

Also confirmed are Rosario Dawson as Batgirl/Barbara Gordon, Mariah Carey as Mayor Marion Grange, and Ralph Fiennes as Batman’s loyal butler, Alfred.

The film is directed by Chris McKay who’d be best-known for cult favourite Robot Chicken.

What’s been your favourite trailer to come out of Comic Con so far? Let us know in the comments.