The official WWE WrestleMania 34 program is still listing The Undertaker as unconfirmed for Mania on Sunday night, and has the following listed on the status of his match against John Cena.
“Will Undertaker accept John Cena’s Challenge at WrestleMania? As of this writing, we cannot confirm if this match will take place”.
WWE has not announced The Undertaker vs John Cena for WrestleMania 34, Undertaker is scheduled to be at the PPV in New Orleans on Sunday night.
According to The Wrestling Observer Newsletter, Undertaker vs John Cena has been the planned WrestleMania 34 match for months, and Undertaker has been training for Sunday night.