Metro

Metro is a cancelled Disney movie that would have been another Cars spin-off after Planes and would focus on subway trains. It was scheduled for a 2021 release.

Why it was Cancelled

1. It will be very difficult to have a train as a protagonist, unlike cars, busses, trucks, planes, helicopters or boats, trains cannot move freely and only move were the rails take them.
2. Disneytoon Studios shut down on June 28, 2018.
3. Some people could've accused it for plagiarizing Thomas & Friends, Chuggington, Crash Bandicoot or Titipo Titipo.

Results

1. With Metro being cancelled, the Cars and Planes would be the only two series that would exist in its own universe.
2. This, Planes 3, and To Protect and Serve are the three cancelled Cars projects.
3. This movie did borrow some elements from Moon Girl and Devil Dinosaur.
4. Some users said the wrong movie title as Trains and they said that it was going to be released on July 10, 2021.

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