Lego Superfriends

Lego Superfriends was a planned sequel to the 2017 film The Lego Batman Movie, with Chris McKay returning to direct the film. The film was set for a release in 2022.

Plot
According to director Chris McKay, the sequel was to be about the Justice League and where Batman was in terms of the Justice League now, and the struggles they were going through, as well as flashing back to how the Justice League came together. It would've also featured Batman and Superman’s relationship, as well as Batman’s relationship to a lot of the other members of the Justice League. Lex Luthor and OMAC would have been the film's main antagonists.

Cast

 * Will Arnett as Bruce Wayne / Batman
 * Channing Tatum as Superman
 * Michael Cera as Dick Grayson / Robin

Rest of the cast is unknown.

Why It Was Cancelled

 * 1) Although The Lego Batman Movie was both critically and commercially successful, both The Lego Ninjago Movie and The Lego Movie 2: The Second Part were box office disappointments, causing Warner Bros. to end their movie deal with Lego in December 2019. Plus, Warner Bros. owns the rights to characters from DC Comics, thus ending any chances of the sequel happening.

Results

 * The sequel was permanently cancelled and The Lego Batman Movie is stand-alone.
 * On December 19, 2019, Universal Pictures and The LEGO Group were in talks to sign a five-year exclusive deal to develop new LEGO films, which was finalized on April 23, 2020.