as per post on pinside

New free downloadable Pinball Magazine special:
Veteran pinball designer John Trudeau discusses his latest game: WrestleMania
Lots of new details about the game and upcoming LE version!
http://www.pinball-magazine.com/?p=2440

Note the line about WrestleMania almost being released as a Pro only.

I'd always wondered why Stern wouldn't do some machines as a Pro only, where there isn't much difference in the Pro and LE/Premium.  They could charge an extra $500 dollars for a single model Metallica or Mustang with the LE/Premium playfield - the additional features on the LE/Premium could have been easily/cheaply added into the Pro model.  Cost would drop with the larger/single run on the LE/Premium playfield.

WrestleMania Pro may be another one of those machines that the better value game would be the Pro.