Untitled Lego Movie Universe sequels

Warner Brothers originally had more movies planned for the Lego Movie universe. Aside from The Million Brick Race, none of the sequels were given a name.

Plot
Unknown

Why It Was Cancelled

 * 1) The Lego Ninjago Movie and The Lego Movie 2: The Second Part underperformed at the box office compare to the first Lego Movie and The Lego Batman Movie.
 * 2) Warner Brothers ended their movie deal with Lego.

Results
After Warner Brothers parted ways with Lego, Universal Pictures acquired the rights to Lego and will be making a different Lego Movie universe not connected to the Warner Brothers one.

Reference
https://youtu.be/3FIIla8Y29o