FunkDoc1112
Heavily Armed
It was a little weird that he happened to be the main focus of that Discovery Channel documentary about UPW back in 2000.The only time there were wrestling plants was in the late 90's/early 00's when WWE was using a Cali indy UPW as an unofficial development territory. That's where Cena started. Some think he was signed by WWE before he even joined UPW
Then again, they probably did in-depth looks at everybody when filming but since Cena was one of the few who actually got signed they just chose to use his stuff.