Believe it or not, the slasher flick is one of the trickier movie genres to get right. You have to have just the right amount of blood, for instance; too much grosses people out, and not enough turns off the fans who want to see some gore on the big screen. But you also need to make sure the story that fits around the murdering hooks people in. If the people getting chopped up are just cardboard stereotypes, audiences lose interest quickly. Throw in a good old-fashioned whodunnit, and you've got the makings of a classic blood and guts movie.

Killer Movie, which debuted at Tribeca on Thursday, gets many of these elements right. But it also has glaring flaws that keep it from being a cut above (pun intended) its slice-and-dice brethren.

With the majority of casting out of the way, and production currently in full swing, Variety reports that Nestor Carbonell has signed on to play the mayor of Gotham in The Dark Knight. Aside from Carbonell, they've also confirmed the casting of Eric Roberts as a Mafia kingpin (which we already knew), but did not mention the name Sal Maroni even though a number of sources have indicated that Roberts will indeed play the infamous gangster. For those familiar with Carbonell (who was last seen on screen in Smokin' Aces), it's kind of comical that he would be involved with a Batman-related film. Back in 2001, Carbonell played a character called Batmanuel (picture the opposite of Batman -- I mean, dude drove around in a gold Buick) on the short-lived series The Tick. Remember that? Then again, maybe it's best if you don't.

There's no word on how big of a role Carbonell will play in the film; the mayor isn't necessarily a major character, so I wouldn't count on him appearing in too many scenes. As far as when we'll get to see some of The Dark Knight, recent rumors suggest there might be a teaser trailer playing before Harry Potter and the Order of the Phoenix. Since there's no possible way they've cut together enough footage to show us something substantial, I imagine if they do shovel out a teaser, it will be more along the lines of flashy graphics followed by some rough written-for-the-teaser dialogue. Oh, and perhaps Warner Bros. will take that opportunity to show us a pic of Joker -- I'd like that. Currently, The Dark Knight is scheduled to arrive in theaters on July 18, 2008.