The Undertaker is only worth listening to when he's a zombie. Or a ghost, or a Frankenstein, or whatever he was supposed to be before they turned him into a middle aged redneck biker.
His undead gimmick was getting very, very thin when he retired it. That he was repackaged as something else not terribly good shouldn't distract from the fact that his old thing was quite stale.
Thin? NEVER! The 'takers zombie bit never got old; in fact, I stopped watching wrasslin' specifically because of that biker bullshit. No amount of Chris Jericho or Lita in low-slung cargo pants could make up for the Dead Man turning into a Kid Rock listening puss.
I remember a Conan O' Brien skit from this time that was just a compilation of mock commercials and jokes about the XFL. I couldn't find it, but it totally deserves that XFL tag.