#4 Edge
The buildup to the debuting Edge was well done, with well-assembled vignettes promoting his arrival. But while he went on to have an incredibly successful career, capturing multiple singles and tag team championships, his initial match in the company didn't turn out so well.
Unfortunately, an ill-executed move affected his debut. After attempting a somersault plancha over the top rope, the way he landed caused him to break the neck of his opponent. The opponent was Jose Estrada, one of Savio Vega's faction Los Boricuas.
Though Edge climbed back into the ring, his opponent could not. Estrada was legitimately hurt, but Edge had no idea what had happened. His reaction to Estrada not getting back into the ring was one of legitimate confusion.
He acted out of character at a crucial time, when he and the promotion wanted the fans to understand that character. Thankfully, with time Edge showcased his skills in the ring and on the mic. The unfortunate circumstances of his debut did not end up defining him.
