#1 CM Punk returns to action

One of the ground-breaking things to happen this year in WWE was CM Punk returning to WWE via Backstage on Fox. While technically he is only involved with Fox, it has not stopped his hardcore fans from speculating and predicting a potential in-ring return for the former WWE Champion.
Furthermore, given how things have been unfolding between Seth Rollins and Punk, a WrestleMania matchup between the duo does not seem a far-fetched idea. I mean, from Rollins calling out The Best in the World to Punk not showing up to The Architect's interview backstage, it seems WWE has something huge planned.
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Punk vs Rollins at the Grandest Stage of Them All has the capability to blow off all charts. Given the fan following Punk enjoys, it would not only be best for business, but it would also be a celebration.