#1 Kevin Owens
Kevin Owens has turned from a stale heel to the hottest babyface in a matter of two weeks. Owens turned face on last week's edition of SmackDown Live after attacking Dolph Ziggler, who had cost him a shot at the SmackDown Tag Team Championships by being pinned by one-half of Heavy Machinery. Owens would berate Shane McMahon the following week in an awesome promo that was reminiscent of CM Punk's infamous "Pipebomb".
Owens would stun Shane at the end of the match, establishing himself as the hottest babyface in WWE. WWE would have been smart to schedule a match between Owens and Ziggler, but that it could always be added as an impromptu match.
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Given that Owens is so over and popular right now, WWE would be wise to have him appear in some sort of capacity at Extreme Rules. He could go after Shane again in a backstage interview, he may decide to decimate Dolph Ziggler, or he may attack Shane during his tag-team match against The Undertaker and Roman Reigns.