The Master of Ceremonies is a commentator. He is very Puckish. Playing both victim and instigator. Everything that takes place inside the club comments on what is happening beyond its walls.
Now, if you are referring to the ending, it has always been implied even if subtly, as in the original that he would die. The last revival just took it to the next level.
One of the beautiful things about this show is that it is often left to the audiences interpretation.
"For me, THEATRE is an anticipation, an artistic rush, an emotional banquet, a jubilant appreciation, and an exit hopeful of clearer thought and better worlds."
~ an anonymous traveler with Robert Burns
