Here's the newest trailer for Bullet to the Head, which pretty much covers the same ground as the first trailer and the international trailer. There's shooting and revenging and takening, and as Nick mentioned a while back, you've also got the requisite "hurr hurr yer old" and "hurr hurr yer Asian" jokes. (I really wish the character names were Giuseppe Olde and Michael Asianguy.)
The notable difference between trailers is the music that closes them out. The new trailer and the first trailer ended with "Badass" by Saliva. (The first trailer should have owned Foreigner's "Hot Blooded" and ended with that.) The international trailer ended with "Killers" by Motorhead. You don't need to be a scientist to know that Motorhead > Saliva.
Bullet to the Head punches movie theaters in the throat on February 1st, 2013.