Guillermo Del Toro and Ron Perlman had recently expressed interest in working on the third Hellboy movie. Regardless of the fact that Hollywood analysts are skeptical of this ever happening because the 2 other Hellboy movies were not the gigantic blockbusters they hoped for, Del Toro is bent on giving his own superhero movie saga a fitting conclusion, because the first 2 movies had already set up subplot details that should surely culminate in a third movie. In Hellboy 2, Liz (played by Selma Blair) had made a vow to the Angel of Death to sacrifice even the world if it means saving the life of Hellboy.
