Fantastic Four 3

Fantastic Four 3 is a third and cancelled installment of the 2005 Fantastic Four series produced by 20th Century Fox and Marvel and was scheduled for a 2009 release. It was slated to bring Black Panther to the film series.

Plot
Unknown

Why It Was Cancelled

 * 1) Black Panther's film rights remained at Marvel.
 * 2) The cast of the first two films expressed no interest in making a third film.
 * 3) It was cancelled due to the negative performance of Rise of the Silver Surfer.
 * 4) The film would have likely used The Puppet Master as the main antagonist as the film would have focused on Ben and Velicia's relationship

Result

 * The film was permanently cancelled after Marvel and Fox both hit the reset button with the 2015 reboot as a result of the reboot's failure.