Operation Nebula: Origins

Operation Nebula: Origins is an upcoming animated movie and it will reveal Nebula's origin story. It's release date is unknown.

Plot
"When a mysterious crystal lands in Shnitzalburg, Travis gains the power of an old leader of a planet. But when an undead harbinger of doom comes to extract to power of the crystal and harness it to make a weapon to destroy earth, Travis and his brother, Maxwell, must make a stand to become the one thing interesting in their lives: to be real heroes!"

Trivia

 * Not much is known about the movie.
 * Ben Smith decide to pause production on Nebula episodes to make the film.
 * This will reveal Nebula's origin story.