What would a Marvel movie by Guillermo del Toro be like? Audiences may never know, but they were ever so close to knowing when the director teamed with Neil Gaiman to pitch "Dr. Strange" to the studio.

Gaiman recently revealed on Twitter that he and the Mexican director pitched some ideas to the studio, but were ultimately rejected.

"I still wish Marvel had been interested in a @RealGDT & me Dr Strange movie, because I wanted to write Clea so badly after 1602," Gaiman tweeted.

We all know that Marvel went with the current Benedict Cumberbatch-starrer, but it is nonetheless yet another example of a potential del Toro project not coming to fruition. The director was also slated to direct the "Justice League Dark" movie, but opted for seeking out a way to continue his "Pacific Rim" franchise. Of course everyone knows that the face of the Kaiju sequel is up in the air, despite the fact that the auteur recently submitted a script and budget to get it made.

Another comic book film that remains in the air is Del Toro's third part of the "Hellboy" trilogy. The last installment was released in 2008 and the filmmaker has not been able to get the greenlight to finish off the story that he started back in 2004.

The director is still holding out hope for that project's eventual actualization, but for the time being he is remaining rather quiet about what other movies he is working on.

Del Toro was also slated to direct the two "Hobbit" films before they became a trilogy, but dropped out.

Despite the long list of postponed and cancelled projects, del Toro is a well-respected director best known for such fantastical films as "Pan's Labyrinth," "The Devil's Backbone," "Pacific Rim," "Cronos" and his recent movie "Crimson Peak."

Gaiman is an author who wrote "Coraline" and "Stardust," and also wrote the script for "Beowulf."