#1 Rusev
I know that the unanimous sentiment at this moment is that Rusev is being wasted in the storyline with Bobby Lashley, but if you tuned into Starrcade you know that Rusev was, by far, the most 'over' Superstar at the show. It's a storyline that has even given WWE a reason to keep Lana on TV, something that wouldn't have happened had she been just another professional wrestler.
Honestly speaking, Rusev's time should have come a long time ago back when the whole 'Rusev Day' movement was in full swing, but better late than never. Rusev is a great worker, he's liked in the back and he can certainly lead the brand to glory.
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It's a testament to his popularity that the crowd still chants for him so many days after 'Rusev Day' ended. And the Lana story has ensured that he's become a sympathetic babyface.
I'd go so far as to say that he can potentially go up against Brock Lesnar and have a chance at becoming the next WWE Champion.