It is being said that early creative plans within the WWE are currently calling for a match between Undertaker and Brock Lesnar at WrestleMania 29. Although plans can always change, this report goes along well with the "quitting" angle that Lesnar has been involved in, because this allows WWE to conserve dates on Lesnar's contract. When he signed, he agreed to a limited short term contract lasting about a year, but only allowing himself to work limited dates. WWE believes that they have left enough dates in order to build up a decent feud early on next year.
This report also disproves any rumors of WM28 having been Undertaker's last match.