Star Vs The Forces of Evil: The Movie (Disney/Pixar Film)

Star Vs The Forces of Evil: The Movie was a proposed movie announced in 2017. But as production went on, it suffered through many issues which led to it getting cancelled.

Plot
Not much is known, but the film would've been about Star and Marco going on an ocean trip for Marco's report about ocean life.

Why It Was Cancelled

 * 1) As mentioned, the film suffered through a huge amount of production issues such as other Pixar directors like Lee Unkrich working on other projects.
 * 2) On May 4, 2019, Pixar announced that they ended their collaboration with Disney XD, which is another reason why the film was cancelled.
 * 3) Star Vs The Forces of Evil ended on May 19, 2019.
 * 4) The film was stuck in development since 2017, to the point that they decided to automatically cancel it.
 * 5) Another reason could be the fact that the concept was completely hard to write.

Results

 * 1) The film was permanently cancelled.
 * 2) Star Vs The Forces of Evil remains a TV series.