Since Rikishi is going to be at WM with him being inducted into the HOF, I would like to think that he'll accompany The Usos to their match, whatever that may be. My first thoughts are towards some sort of tag team turmoil match or a fatal fourway as a match designed to get as much of the roster on the WM card.
Out of the current tag teams, I think The Miz would be the most obvious choice to be on the receiving end, think they could do something funny with the stunt double Mizdow not being up for taking it. However, I'm not sure if Miz and Mizdow will last that long so I'm not sure who else. Maybe Heath Slater as part of Slater Gator