Laugh it up all you want, but, (and I hate stressing this point again and again) the Rock isn't that well known in third world countries. In countries like India, China, etc... people watch more wrestling than they watch movies and, the Rock isn't that big of a movie star. The only big blockbuster he's been in is Fast Five, the rest of them have either been regular flicks or movies he hasn't had big parts in. He's hardly a draw.
Also, back to the point of Rock having more followers on twitter, well, twitter is a western thing, not many people have it in Europe or Asia, or at least, not as many as you'd think.
Oh really?! Well just so you, I LIVE in one of the so called "Third World Countries", as you said. When you ask people about wrestling, 4 names comes first, Hogan, Rock, Austin, and Taker. These 4 are the most popular wrestlers aroung here, so I really don't know where you got that from....Hell, alot of people know rock as "Dwayne Johnson" the actor. I'm talking from a personal experience. Most poeple who know who cena is are 5-12 years old kids.