I think the AOL/Time Warner merger was a huge blow. If Turner maintained control of his company, he would never have pulled the plug on WCW. Even if their product was waning, there would still be competition, a place for guys to go and the chances that one of the two promotions would rise up and fall into something like they did in the 90s are higher than they are with just one major company that can eschew and use up talent at will knowing that if they quit/leave there is nowhere prominent for them to go.