I think most of you are looking too much into this. I'll bet money that their either mates or have a good mutual respect for each other. The amazing promo that Cena cut was to get people talking and waiting for Wrestlemania. I bet that Rock respects Cena for what he does each week and Cena respects Rocky for doing something he loves to do. Point is its kayfabe and John Cena's promo did exactly what it was meant to do. This is going to be a good WRESTLING match from BOTH men.