As far as Hogan being mainstream, I'm not so sure. Not that the mainstream isn't aware of it, but the general feeling I'm getting is that people are looking at it as a joke, as in "Wrestling is soooo fake, they have an old fossil like Hogan as champion." I heard some DJ talk about how Rock must be a great actor, because he was able to have a staredown with Hogan without bursting out in laughter.
Yes. Believe it or not, at one time there were more than two wrestling companies! Par exemplar: 11/19/2K WWF Survivor Series 11/26 WCW Mayhem 12/03 ECW Massacre on 34th Street 12/10 WWF Armageddon 12/17 WCW Starrcade