|Crockett expands from Mid-Atlantic by buying out Georgia/UWF/Florida/Central States and monopolizes the NWA World title, which causes WCCW to quit the NWA.
Ted Turner buys out JCP and creates WCW, otherwise Vince would have been the only game in town about a decade earlier.
Changes in the TV industry end the era of syndicated programming, which changed the entire landscape of the wrestling biz. Instead of using TV to hype local shows, local shows now only exist to hype TV. That was a pretty monumental shift in business that gets somewhat slept on in the list of things that Vince was able to be ahead of the curve on.
The death of syndication also meant that smaller wrestling territories/groups had no outlet for local TV unless they were an institution like Memphis and Portland, and even then that's the first thing to go when an new owner wants to save money.
WWE leaving Spike for USA, without that happening TNA would have no national TV exposure. The verdict on if that's a good or bad thing is left up to the reader.