Dragons are common in movies too.
The last one is based on the book Eragon, the movie has the same title.
The trailer.
Link:
http://www.eragonmovie.com/
http://www.imdb.com/title/tt0449010/maindetails
Postakoliptic movie "Reign Of Fire" is playing with sience, and really has good things to say about dragons.
http://www.imdb.com/title/tt0253556/
And there is "Dungeons and Dragons" well now role-playing game as weel as movie.
Trailer
Link: http://www.imdb.com/title/tt0190374/
They did make a seguel. It was BAD.
Link: http://www.imdb.com/title/tt0406728/
Dragons are in Harry Potter movie too. Harry Potter & The Goblet Of Fire
Dragonheart excellent movie.