#2 Bobby Roode
Former TNA World Champion and NXT Champion Bobby Roode made his main roster debut on WWE Smackdown just after Summerslam and has had a pretty decent run thus far, feuding with top stars such as Mahal and Randy Orton, as well as becoming WWE United States Champion.
The 'Glorious' one has all the potential in the world to become a huge star in WWE, both as a face, but particularly as a heel.
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Roode made his RAW debut as the final TV RAW Shakeup trade, in the main event of the show as a mystery teammate in a 10-man tag team match, and was very well received by the live audience.
I can see an impending heel turn for Bobby, between now and then to include challenging for the WWE Intercontinental Championship, before moving on to top-tier feuds.