#2: Stardust
There must be a small part of Vince McMahon kicking himself for allowing Cody Rhodes to leave the WWE and potentially start the first promotion to truly challenge the company for the first time in nearly 20 years.
Then again, all McMahon did with Cody when he had him on his books was mistreat him and book him as a cheap imitation of his older brother.
Back in 2013, Cody Rhodes and Goldust had an excellent run as a tag-team and the WWE botched it by having the duo go on a lengthy losing streak.
The end result of that streak was Cody effectively deciding to replicate his brother's gimmick and thus, Stardust was introduced to the WWE Universe.
Rhodes quickly got relegated to comedy/jobber status, despite giving the clearly ridiculous act all of his effort.
The gimmick is reportedly one of the big reasons why Rhodes requested his release from the company in 2016.