Bumblebee (Michael Bay)

Bumblebee is a planned spin-off prequel film that was supposed to be released in Summer of 2018 before it was changed into a rebooted franchise.

Why It Was Cancelled

 * 1) The Last Knight was widely panned by critics, fans, and audiences alike and flopped at the box office.

Result

 * 1) The film's premise was changed into a reboot. Bumblebee was praised by critics, audiences, and fans alike.