Peter Jackson is set to write but not direct the upcoming Hobbit films, which has raised concerns among fans about the direction and leadership that made the Lord of the Rings (LOTR) films successful. Jackson is occupied with two other projects, leading to speculation about Guillermo Del Toro potentially taking over as director. Del Toro's work on Pan's Labyrinth has garnered praise, suggesting he could bring a unique artistic vision to the Hobbit films. There is a consensus that the Hobbit should maintain a lighter, humorous tone, contrasting with the serious themes of LOTR, as the story lacks the dramatic weight to be treated as a grand morality tale. Production for two Hobbit films is scheduled to start in 2009, with releases planned for 2010 and 2011. Fans express nostalgia for previous adaptations, including the animated version from the 1970s, and hope the new films will capture the whimsical and adventurous spirit of the original book.