Hahaha, I would laugh.Iiiinteresting... You're right, he should show up. And he should start to walk away after accepting the Slammy, only to turn around and challenge Undertaker at Wrestlemania XXVII. "Just one more time, I promise."
No, not really. Maybe have Nexus beat him up just for the lulz.
Ehh, it makes sense for someone like The Rock or Barker who either have a lot of stuff on their plate or are too old for it to be easy to travel everywhere.This makes the most sense.