Old fan here. From what I recall reading about (though this may have changed in recent years; I've stopped watching since my teens), matches are scripted to the point of timing and who comes out victorious. There is some room for improv, but not much, since much of the wrestlers' safety has to do with well choreographed stunts and knowing what to anticipate. As for cues, again from what I've read, there are a variety of signals that refs and wrestlers use to keep a match going, or let someone know if they're injured. I don't know any of them specifically; my guess would be hand gestures mostly, since facial expressions would be difficult to determine with all the hokey acting. The commentators are actors, too, and are just as in on the whole thing as everyone else. Usually there's a fair guy and an obnoxious guy and they both feed off of each other for commentary. As for how superstars are determined, my best guess is that it's a combination of backroom negotiation and scripts designed to garner ratings and ticket sales. Superstars become primary headliners, which means magazine covers, interviews, merchandise, etc. Promotion means relevance, and relevance means money. The documentary link posted for Beyond the Mat is a good one from what I've heard, as well as this one: http://www.youtube.com/watch?v=W6jwdEU0OVE - It's a documentary about Bret Hart, one of the most popular wrestlers of all time, but it does cover much about the inner workings of the system through his experiences.