Now I know he didn't actually win the world title while he was in WCW but he was a few days from being given it.
Story goes that in an attempt to reboot the entire WCW promotion, head booker Vince Russo decided that for the main event of the next pay-per-view there would be a battle royale to determine who the new champ would be.
It would be made to look like Psycho Sid would regain the belt when Tank Abbott would be the last man to enter the match, knock out Sid, and become the top dog of WCW.
This idea was hated so much by WCW heads that Russo was almost immediately demoted and the idea was scrapped.
The idea of having Abbott as the world champ is completely absurd, not only was a semi known UFC fighter with one of the worst records in the league (8-10), he was a horrible wrestler who had been booked into oblivion and became a groupie for the boy band trio Three Count.
True champion material indeed.