Shhh....guys, stop giving Infinity Ward ideas! They will most likely use them. The torture idea seems the most plausible.
My idea, well it's only the greatest, most amazing, super-duper concept to grace the mind! Here goes: After the death of John "Gator" Eisenstein,(The first Jewish Call of Duty character!) Ghost(Who wasn't really dead due to humoungous fan response) and some random middle-aged father of three, who gets executed in the game's intro by the antagonist, you play Mohawk-boy himself, Soap MacTavish. In the final mission you chase the villian, uhhhh....let's see....Omar McMeanie. You finally catch up to him and tackle him off of a cliff. You hit the ground and black out in another "dramatic" Call of Duty experience.
....
You wake up and find your torso is the epitome of a F@$#ed up mess. Your intestines are outside of your body strewn about, when Omar approaches you. He gives you a generic villian monologue, surely dropping in a gratuitous F-bomb. Right before he executes you, you have to click the right stick to lunge at him and strangle him to death with your own intestines. You collapse as Captain Price(Back with his porno 'stache) runs to aid you as you black out. THE END. It's better than "Da, I know a place".