I remember hearing billy Gunn having to hold shamrock back bc he was gonna kill one of them at an airport tf did ken fuck the nasty boys girl or something? They don't fuck around they shot on Scott Hall on nitro live
I think it was The Rock, might've been Billy Gunn (or both) that held him back. He randomly saw them in the airport and was going to get revenge on them but it obviously didn't happen. This was before 9/11, too, so who knows what would've happened.
Here's a what-if for ya, what if the Nasty Boys did what they set out to do and actually threw Ken Shamrock out of that hotel window in the early 90's? Ken would've either died or probably permanently crippled meaning he'd never go to Japan and be one of the major faces in MMA from his work in Pancrase and RINGS and the UFC would've never gotten the Gracie-Shamrock run in it's first few tournaments and he wouldn't be able to give that tough guy legitimately to the attitude era WWF and be the guest referee at WM13.
I don't think it would've changed wrestling history much, although obviously no Shamrock in WWF so they'd have had to do something different with Ken's debut being in the upper card and the 1998 KOTR win, but otherwise he didn't really factor into much. Dan Severn might've gotten his spot instead? I know Severn was in WWF but didn't really do all that much since he was kind of boring character-wise. Shamrock was similarly bad on the mic but was more charismatic and had a better look. One plus would've been that the Nasty Boyz probably end up in jail for life and we don't have to deal with them in WWF/WCW/TNA
As for MMA, it would've been much different. Gracie-Shamrock feud doesn't happen like you said, which means early UFC is different. Maybe Severn would've taken his spot here, too? I am guessing not because the Gracies intentionally didn't want a greco wrestler in the first few tournaments. My guess is that some other similar catch wrestler gets the spot, I have no idea who, and Gracie ends up submitting him as well. There is no Gracie-Shamrock feud, but the early UFC was kind of a financial disaster anyway so it might not change much there. Japan was where the big money in early MMA was, up until PRIDE folded in 2007 (or whenever it was).
The bigger difference is that Ken had pretty much the first full-time, complete MMA school/camp called The Lion's Den. Back then, MMA fighters would typically go all over for their training. One school for boxing, one for wrestling, etc. Lion's Den was really the first that offered it all. It was incredibly hard to get into but it was the best camp back then and a lot of early MMA pioneers trained there or its offshoots. It also inspired a lot of other people to start full-time, complete gyms. Granted, that would've happened eventually anyway but guys like Jens Pulver, who was the first UFC lightweight champ, ended up training at one of the early offshoot schools. Pulver was a pioneer for the smaller weight classes and his early "feud" with BJ Penn helped propel the UFC to new heights