Guillermo del Toro has admitted that it's "unlikely" that Hellboy 3 will get made, because he can't get the financing for it.
The Pacific Rim filmmaker revealed he has the story already planned for the third instalment of the comic book films, and insisted he will continue to try to get the money to get the movie made.
"We are still working on the financing, so far no luck! But we won't give up," he told the Guardian.
He also told Collider: "It's very unlikely it'll happen because you need things to converge so strongly. You need so many things to confluence and then you need about 150 million US dollars."
Ron Perlman starred as Hellboy in the 2004 film, followed by a sequel, The Golden Army, in 2008.
Guillermo revealed that the third film would stand out from the previous two.
"The way Hellboy 1 and Hellboy 2 are very different from each other, Hellboy 3 is different enough from the other two that it wouldn't feel like the same universe in scale. He does become the beast of the apocalypse," he continued.
"But seeing the apocalypse is getting more and more - the bar is raised higher and higher every year; mass destruction is becoming the sport of the summer."
The Mexican filmmaker also said he would try to turn HP Lovecraft's novel At The Mountains Of Madness into a film, which Tom Cruise was attached to star in. He started developing it in 2006 and has written a screenplay with Matthew Robbins, but talks with studios have fallen through.
"We are still going to try and get Mountains made. We generated hundreds of pieces of art that are heartbreakingly beautiful. We are not going to give up," he said.