F4WOnline.com is reporting that the WWE creative team has been told not to mention or have either Triple H or The Undertaker reference their match at WrestleMania 17.
As most are aware, 'Taker and Triple H wrestled each other 10 years ago at WrestleMania, and of course The Undertaker won. But WWE wants to put Triple H over as a credible threat to The Undertaker's streak, so creative has been told not to have the bout mentioned on TV so that the marketability of the WrestleMania 27 match is not hurt, nor is the fan's perception that Triple H can actually end the streak.
If anything I think they would want to mention it to add heat to the feud, regardless another case of WWE just trying to pretend stuff in the past never happened.