Despite a number of rumors, The Undertaker will not be going after the WWE World or Universal Championship at WrestleMania. In addition, it was speculated a few months back that The Deadman will go against Braun Strowman at this year's Mania in Orlando, that also will no longer be the case.
It’s also worth noting that Dave Meltzer of The Wrestling Observer said that The Undertaker will be facing someone on the Raw brand, which rules out John Cena. It also explains why he was on this week's Raw.
The only matches that remain locked for the show right now are Brock Lesnar vs. Bill Goldberg, Seth Rollins vs. Triple H and Big Show vs. Shaquille O’Neal.
Plans are continually changing with regards to the top tier matches, in fact just last week a number of "key changes" were made the upcoming WrestleMania card.