I did a google on the top 10 grossing movies of all time. It seems the world is definitely in tune with fantasy flicks.
What do you mean fantasy? The only ones I could find over at imdb that wheren't already part of an established franchise where Titanic, Finding Nemo and Independance Day (and that was in the top 20). Unless you're planning on licensing Harry Potter, Lord of the Rings or Star Wars, I don't think 'Fantasy' is a particularly good genre.