Just FYI, Jackson is not directing The Hobbit. Guillermo del Toro is. He's the dude that directed Hell Boy I & II and Pan's Labyrinth.
Jackson is listed as Producer/Writer so will still have a hand in the Hobbit.
I saw Pan's Labrynth and Hell Boy (I). Didn't really care for Pan's Labrynth and Hell Boy was okay.
I cannot comment on Helly Boy II as I have not seen the movie.