Untitled Lego Movie Universe sequels

The Lego Movie 3 Was An Canceled Sequel To The Lego Movie 2 Warner Bros. originally had more movies planned for The Lego Movie universe. Aside from The Billion Brick Race and Lego Superfriends, none of the sequels were given a name.

Plot
The premise Would be After Events Of The LEGO Movie 2 But Rest Is Unknown

Why They Were Cancelled

 * 1) The Lego Ninjago Movie and The Lego Movie 2: The Second Part, despite receiving positive reviews (except for the former, which received mixed reviews), underperformed at the box office compared to their predecessors.
 * 2) Warner Bros. ended their movie deal with Lego after half a decade of releasing four films.

Results

 * After Warner Bros. parted ways with The Lego Group from making theatrical films with them (though they are still working together with making video games and some licensed direct-to-video productions), Universal Pictures acquired the theatrical film rights to Lego and will be making a different Lego Movie universe that is unconnected to the Warner Bros. one.
 * Both The Billion Brick Race and Lego Superfriends were permanently cancelled after Warner Bros. gave up the film rights for Lego.
 * Unikitty, a spin-off television series featuring the titular character, ended after its third season on August 27, 2020, with a two-part series finale "The Birthday to End All Birthdays", thus ending the Warner Bros. era of The Lego Movie franchise (aside with an attraction based on that for Legoland California).
 * Aside from The Lego Batman Movie and The Lego Ninjago Movie, the two main Lego films The Lego Movie and The Lego Movie 2: The Second Part are currently a duology.