I feel very lucky to have grown up watching the Monday Night Wars and Attitude Era. I actually loved WCW in the early 90's too but it was very PG and cheesy. Vince was certainly an innovator. I remember when Hogan dropped the strap to the Undertaker and it was huge and shocking to young me at the time b/c Undertaker wasn't quite a huge name just yet and Hogan rarely put someone over. Later I remember watching the first Monday Night Raw on the USA channel and WWF programming was really pushing their Icopro supplement line (Vince was trying to get the WBF off the ground & his federal case was under way although soon to be over).
One thing I found ironic though, is how he poached wrestlers from all of the territories in the early and mid 80's and then when a few of his big names like Lex Luger bounced, he was upset because he thought they had a "handshake agreement". Did he forget how he snatched up the best talent in the country to get the WWF rolling?
Stone Cold vs. Mr. McMahon was one of the greatest angles ever IMO. Stone Cold was probably the biggest thing in wrestling in my lifetime. Even people who weren't wrestling knew about him. I got to meet him and he was exactly as you'd expect. That same day I also met Francine of ECW fame and she was at that time, probably the hottest most gorgeous woman I'd ever seen in person.
Overall, I didn't find anything too shocking in the documentary but that's because all of the "dirt" was familiar to me but unless you're a nerd with it, I'm sure there will be some shock value.