#1 John Cena vs. Lars Sullivan

The on-going rumors about a possible feud between John Cena and Lars Sullivan have been making rounds for nearly a month. Just like EC3, Sullivan was also advertised to debut on the main roster by The McMahons as part of their "New Era".
WWE always had high plans for Sullivan since he is a typical "Vince McMahon Guy", so his first planned rivalry was supposedly against none other than 16-time World Champion John Cena, and at WrestleMania. It was big milestone for a new superstar like Sullivan.
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The plan to sow the seeds for this rivalry was by having Sullivan injure Cena in a backstage segment which would pull him off the Rumble match, then return for a match against Sullivan at WrestleMania. But, two weeks ago Sullivan reportedly suffered anxiety attacks and completely cut contacts with the company which made Vince MacMahon really upset.
Recently, Triple H confirmed during the NXT Takeover: Phoenix media call that Sullivan is in good condition and he will return soon. The company is also still high on him and have started discussing on his push once he’s ready to come back.
Even though WWE maybe created a fake injury angle for Cena due to his film schedule, he is still advertised to be in the Royal Rumble match. Perhaps, WWE can finally kickoff the impending feud between Cena and Sullivan for WrestleMania at the pay-per-view.