The Mexican filmmaker told MTV that a third instalment in the series remains a possibility and would likely be the "biggest" entry to date.
"Finally all the culprits have agreed to try. It's very hard to find who will finance it. The biggest chapter in the three movies is Hellboy becomes The Beast Of The Apocalypse. So we have been inquiring, but if you have a rich uncle that has $130 to $150 million," he said.
Del Toro's comments appear to contradict remarks made by Hellboy creator Mike Mignola, who was quoted as saying that a third movie will not be going ahead at Comic-Con International last summer.
Ron Perlman, who played the title character in the first two films, has previously admitted that he has pushed for another opportunity to star as the comic book demon.
Del Toro has also been attached to Marvel Studios' Hulk TV show for some time, a project which he insists is slowly moving forward.