There really something special about having it outdoors. Maybe it's because wrestling events aren't outdoors alot and it provides a unique atmosphere, especially in the Daytime. In WM 9, although alot of people say it was one of the worst Wrestlemania's ever ( Not sure if I agree), the atmosphere was unlike any other we'd had seen before.^^^It would be cool to see Wrestlemania go to Wembley Stadium. I'm really digging outdoor venues.
Plus I wish their would be another Wrestlemania in Vegas, but there isn't a 75,000+ stadium there so I doubt if it would happen.