If you a true wrestling fan, by all means go! Went to Wrestlemania 17 (Lesnar/Angle) (in Seattle)
And it was a once in a lifetime experince. Lots of energy and you remember why you were a fan.
As Cheftim said above, this is probably the Rock's last run, I highly doubt he will be pulling a Flair or Hogan, and wrestling past his prime, since he is doing this pretty much for the fans and wanting to cement his legacy as the best. When his music hits, that will be one helleva pop!
-so yeah go!