#2 Daniel Bryan
Looking at the sheer amount of success he's experienced within WWE, it's hard to believe Daniel Bryan was ever anything but a shining example of one of WWE's greatest Superstar signings.
That wasn't always the case, however; Daniel Bryan was famously fired from WWE before his career had a chance to get off the ground. After a very disappointing run in the first season of the original iteration of the NXT television show, Bryan debuted on June 7, 2010 as part of The Nexus, which was comprised of the entire cast of the NXT show which formed their own stable to take on their main roster counterparts in a shocking turn of events. The man once known as the American Dragon, and inarguably the most talented of all of the men in The Nexus, was fired after his involvement in the chaotic debut of the faction drew significant criticism (to put it lightly).
Bryan was spotted using then WWE ring announcer Justin Roberts' own necktie to choke the innocent man at ringside during the dramatic scene. This was deemed to be "too violent" for the show's PG rating and his contract was instantly terminated, only 5 months after his debut in WWE's developmental promotion at the time, FCW.
Thankfully, Bryan would triumphantly return after only a brief 2-month absence at SummerSlam on August 15, 2010, where he aided team WWE in a victory over his former Nexus stablemates. The rest is history, as he would go on to become the most popular superstar of his era, culminating in a WWE World Heavyweight Title victory in the main event of Wrestlemania XXX - one of the most iconic WWE moments of all time:
It has been speculated that WWE only fired Bryan in order to stave off bad publicity following the "tie incident" and that the company planned to bring him back as soon as the furor surrounding it died down. Be that as it may, the departure only made him more popular, and his fantastic return was a special moment that helped separate him from the pack, which is what puts Bryan on this list.