Okay that has two major problems
1. It basically boils down to "he's the Rock so let's just make everyone terrified of him because he's the Rock". There is no reason why Rock could bother Cena at all when guys Cena genuinely respects in some way haven't (guys like Punk and Jericho and Edge), and especially not when the audience themselves can't do it
2. The idea that Cena can just shrug off what the crowd says but when Rock says it, it's suddenly meaningful? No. That is absolute bull****. To have that happen would be to completely and utterly spit in the face of the entire story, because you're now telling us that Cena's established character doesn't matter, they're going to just erode the things he stands for the most solely because Rock's a "legend" and everyone has to look stupid next to him. Cena's whole character is about the fans, you seriously think "oh, now the fans opinions bug me a bit because Rock pointed it out, never mind that I can walk up to my haters and pose for pictures with them because I'm just happy to have them react to me in some way, even if it is negative" makes sense?
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We clasped our hands, our hands in praise of a conquerors right to tyranny