I'd say either Dragonlance or something where it's obviously a game (like Princess Bride is obviously a book)
Example: People sitting around a table gaming as they play and then the movie transports us into the game with the actors playing their PCs and the DM is the BBEG. It allows the movie to not take itself too seriously and it can introduce things specific to D&D.
Example: People sitting around a table gaming as they play and then the movie transports us into the game with the actors playing their PCs and the DM is the BBEG. It allows the movie to not take itself too seriously and it can introduce things specific to D&D.