Nice post Riley.
I appreciate your extremely deep insight into the poster and the movie plot itself. Your analogy of someone creaming themselves was also quite helpful AND humorous (though I am still not sure that you yourself are past the warm apple pie stage.) Would the poster be better for you if it showed some boobies?
I LOVE the poster as Rileydog pointed out so subtly...This is a recreation of Batman and speaks to Dark Knight side which has been largely ignored in the movies up until this point. Yes, Batman is a badass.
1) Why would anything think he started that fire?
2) Why can't it just be part of the poster for advertising?
3) In the trailer Gordon is seen smashing the Bat light perhaps this is the way that Joker calls Bats to a duel since the light is down?
Further, the tagline fits perfectly with the character of Joker and the trailer clips released so far. It certainly aligns with the very first teaser clip where we hear Alfred talking to Bruce about the crazies in the world who would like nothing less than to see it burn just for fun.
Of course, the are all my HUMBLE opinions from one who is "giddy like a school girl" and apparently has no more load left.