With the success of Iron Man cemented in stone, all eyes are on the next comic book themed blockbuster of the summer on deck. Warner Bros., hoping to capture some of the steam from Iron Man’s earth-shattering debut, released the second trailer to the highly anticipated “Dark Knight” movie. Considerably alot darker than Iron Man, lets see if the Ledger hysteria will hold up to carry this flick to the “Blockbuster” finish line. We’ll see come July 18.