What is the sequel to 'Hellboy', also directed by Guillermo Del Toro, called?

Explanation

Guillermo del Toro is, together with e.g. Alejandro Gonzales Inarrittu, part of the wave of Mexican directors who has enjoyed success in Hollywood during the '00s. He has already marked his place in film history with the Spanish film 'Pan's Labyrinth' from 2006, which became a big, international success. In Hollywood, he has also enjoyed success with 'Blade 2', featuring Wesley Snipes. He also directed the two Hellboy films: 'Hellboy' from 2004 and 'Hellboy 2: The Golden Army' from 2008.