Main card match 4
Competitors: Seth Rollins, Buddy Murphy & The Authors of Pain vs. Kevin Owens, Samoa Joe and The Viking Raiders
Match Type: Hell in a cell elimination tornado tag match
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Reasoning: The rivalry between these 8 has carried Raw in recent times and while it is a stretch to carry their current momentum through to WrestleMania, this match gives everyone involved a major WrestleMania moment without sacrificing the card elsewhere by shoehorning them into other storylines with less substance.
Build: WWE would definitely have to get creative for this match up to still be exciting come WrestleMania but it does seem achievable. A Raw tag team title match can be the feud's focal point at Elimination Chamber before the action can spill outside of the arenas in the build up to WrestleMania. These segments should be over the top and ridiculous with brawls, kidnappings and home invasions all driving the narrative as it spirals out of control. This can set up this monstrous 8 man match to settle the score once and for all.
Match: This should be a spectacle, fitting of the enormous stadium and setting that WrestleMania commands. There can be plenty of weapon use inside the cell here with ladders and tables littered around the ring. Ultimately, the tag team's can eliminate each other, Murphy can come up a little short leaving the most established stars in Owens, Joe and Rollins remaining. Finally, Rollins can get his comeuppance, receiving a serious beating from the duo before finally being pinned.
Winner: Kevin Owens and Samoa Joe, both of whom should continue to climb up the card following the event.