This reminds me, what does everyone think of push failures?
Biggest main event push fail: Some might argue that Sin Cara would fit this description, but I reckon that the biggest push fail in recent memory is Vladamir Kozlov's 2008-2009 mega push. They spent weeks building him up, having him beat jobbers, then the Smackdown roster and finally - even the Undertaker, on his way to a WWE Championship feud with Triple H. What happened? The feud blew up as soon as it begun because fans just didn't buy into Kozlov and were still hot on Jeff Hardy who they voted in place of Kozlov (WWE's choice) at Cyber Sunday. Eventually it came down to a Survivor Series triple threat that then became a singles match before Edge was added into the match at the last second. Edge won the championship and then angle with Triple H was aborted and Kozlov was quickly dropped to the mid card. I actually thought that Kozlov was gaining momentum and might be going somewhere until WWE released him earlier this year.
Biggest waste of potential: That's got to be Shelton Benjamin, who for a time was arguably the most exciting new worker in the WWE. In 2004 he was even given a brief push where he scored pinfall victories over the likes of Ric Flair and Triple H before beginning a meaningful Intercontinental Championship run. So where did it fall apart? The guy couldn't really talk and wasn't given much room to learn, he was essentially placed in one off matches on cards and became an opponent for anyone on their way to the top. Despite being the star of most of the MITB matches, he never got further than that on his way back to the main event path and was released from the promotion in 2010