Sometimes, fan-made art are so impressive that they rival those slick posters produced by the studios. Here's a perfect example:
/Film readers Max B and David B have sent over this fan made poster for a possible sequel to The Dark Knight. Seems like the artist, like most everyone I have talked to, wants The Riddler to attack Gotham City in the next film. But yes, it is just a fan creation (If the question mark didn’t give it away). But the rest of the poster is well done.
Link - via Always Watching (who noticed the subtle addition like the Zodiac cypher and the newspaper article written by Vicki Vale (a reporter played by Kim Basinger in Tim Burton's Batman)