Well if they got a decent author to write a book like maybe Greenwood, Hicks, Wies, etc and then found a good screenwriter that could understand the book and the game in general they would make a decent movie.
So far it seems the movie scripts were written for scene and just bad hack-jobs at trying to throw some of the rules into them.
They need to license the name to someone worthy of making movies, after getting the license back and then a good movie can come along after Courtney is removed from involvment and WotC/Hasbro as well.
I know I could have mentioned Salvatore, but lets face it humans couldn't even see in the Underdark to tell what was going on during his youth for a movie to even be made from it!
DragonLance suffered from mixed methods or it would have been the best movie, but someone saw fit to add CG and regular animation to screw it all up.
What was Hasbro's first toy movie anyway?