My clan and I have theorized for hours about this exact topic. We figure the entire raid will be just an epic adventure full of puzzles and unique bosses (if KF is any indicator) with loads of secrets to find and as you enter the final boss room there will be a musical build up that gives you chills, the door will close and lock behind you with an ominous thud sound and then a cinematic sequence... Of Deej, naked, giving you the finger, while doing his best versions of each racial dance. To be honest, I'm excited.