In my experience iowrestling.com posts a LOT of speculation, almost like a shotgun approach. I don't think they're the worst about it, but it seems like they lean a little on the outlandish side from time to time.
I'd be curious to see the Warrior show up, but I think he's too much of a nutball now for that to even work. The man went bonkers, wrote some comic where he killed Santa Claus, and then disappeared. Let him stay gone.
Goldberg, on the other hand, I'd love to see. Goldberg/Austin is still at the top of my list for dream matches.
This Wrestlemania will probably be the first WWF PPV I'll actually buy and watch.