Michael Cera will voice-star as Robin in The Lego Batman Movie, which is a spin-off of The Lego Movie that Warner Bros. recently announced.
The film recruits much of the same team from The Lego Movie and will feature Will Arnett returning as the voice of the Dark Knight. IMDB also claims that every actor who has portrayed Batman in a live action film will have a cameo in The Lego Batman Movie.
Chris McKay, the animation supervisor on The Lego Movie, is directing and the script is written by Seth Grahame-Smith (Pride and Prejudice and Zombies and Abraham Lincoln: Vampire Hunter.)
In addition to The Lego Batman Movie, Michael Cera has also acquired the film rights to Masters of Atlantis, the novel by Charles Portis, the author who also penned True Grit.
Cera plans to write, direct and act in the adaption. Masters of Atlantis tells the story of a young man in the early 20th century who gets wrapped up in a cult called The Gnomon Society, a secret society built on preserving the mysterious wisdom of the lost city of Atlantis.