Fantastic Four 3

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

Why It Was Cancelled

 * 1) Black Panther's film rights remained at Marvel.
 * 2) The cast of the first two films won't do a film.
 * 3) It was cancelled due to negative performance of Rise of the Silver Surfer.

Result
The film was permanently cancelled. Marvel and Fox both hit the reset button with the infamous 2015 film, then died.