It's not bad, of course you'll get raised eyebrows at the subject matter, but the sentences are too short and choppy with little consistancy in the style. Try combining some of the sentences and flowering it up with dashes, colons, and especially semicolons, as you could use a handful of those little buggers.
Sadly I only got a high C for it. Here is a link for the speech if anyone wants to read it. http://www.killermovies.com/forums/showthread.php?s=&threadid=393964&highlight=batman+speech