Teenage Mutant Ninja Turtles: Donatello's Solo Adventure

Teenage Mutant Ninja Turtles: Donatello's Solo Adventure is a movie released in Summer 2018.

Plot
The story takes place after the Teenage Mutant Ninja Turtles Splatfest Tournament, which Donatello won. The four Teenage Mutant Turtles are having their adventures as normal, but Leonardo, Michelangelo, and Raphael go missing, so it's up to Donatello to save them from the forces of evil.

Trivia

 * This is similar to when Marie won the final Splatfest, Callie goes missing in Splatoon 2.