#4 Rey Mysterio
Rey Mysterio made his in-ring WWE return by defeating United States champion Shinsuke Nakamura in the final World Cup qualifier on SmackDown 1000.
The high-flyer produced some classic moves from his WWE past, including an innovative splash under the bottom rope to the outside of the ring, as well as his trademark 619 move, before getting the win with a springboard frog splash.
In all honesty, it's difficult to see Mysterio winning the tournament – he's the distant fourth pick of our four most likely victors – but if he can build up enough momentum and support from fans on the next two episodes of SmackDown Live, you just never know.
After all, he defeated Dolph Ziggler and R-Truth on the same night in a tournament to crown a new WWE champion in July 2011. The next week, he won against The Miz to become champion.
The reign didn't even last until the end of the show, but that's not the point – he still won the tournament!