#3. Why it's a good idea: Roman Reigns can protect his weaknesses
People forget that at WrestleMania 33, it was Roman Reigns who had to carry The Undertaker through the match. The Phenom looked worse than ever, being slow and old and making multiple botches during the match.
It was quite painful to watch and Roman Reigns may have been the most hated man in all of wrestling at the time, but he wasn't given credit for helping protect The Undertaker. The good part of this match is that Roman Reigns can actually help protect him again.
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Since it's a tag team match, The Undertaker's presence alone will be enough. There's no doubt that it's going to be Roman Reigns who will be doing the heavy lifting for the team, going out of his way to make The Undertaker look good. It'll be interesting to see.