As indicated by Ringside News, the distributer and manager of the Wrestling Observer Newsletter Dave Meltzer claims The Undertaker could be done as an in-ring contender.
Furthermore, with no evident appearance at WrestleMania 35 or both of WWE's up and coming Saudi Arabia appears in the pipeline, the bits of gossip could be valid. Meltzer stated:
"At any rate starting at seven days back he was not doing either [WrestleMania or Saudi Arabia] and clearly [WWE] can freeze and the Saudi Arabia appear if the Prince needs him they can offer him quite a lot of cash to do it, however starting at seven days prior he was not on either appear.
"So I believe he's resigned as a wrestler."