I have an idea for Punk to make Cena even more infuriated (not that the promo that he did on Cena/McMahon that he OWNED them both)
What Punk should have said as far as alluding to the point that Cena is no longer the Underdog, Punk should have said this.
Punk: Cena, you know you are no long a "underdog" anymore, your a "dynasty" and "franchise" and you know what I realized? The ONLY reason that you HATE the Rock/Dwayne so much, is that ...sadly you want to BE HIM"
Speculating to the fact that Cena at MITB would turn heel. Now what could happen is that Punk could win at MITB, and who ever wins the "MITB" (preferably a heel) challenges Punk the same night, but Cena does the unthinkable and helps the Heel win and beat Punk.
Vince comes out and starts to fire Cena, Cena can explain to Vince that he cant fire him because clearly in the stipulation, Vince said that Punk could NOT take the title when leave the WWE with the title. Which he has clearly "prevented". Cena does the AA to the Heel, Vince, and finally to Punk, and to solidify his heel turn, he will turn on the fans. Saying that he tried to be "role model" and that the people turned on him, just like Hogan and Ironically, The Rock. So now he basically hes says SCREW the Fans and hes going to do things for the one person that matters....HIMSELF.
Now this is just and idea. ... And I could be wrong, But I doubt it..(actually I could be wrong for real
GHOST