In the latest edition of WWE Magazine for June of 2012, there is a teaser of where WrestleMania 30 could possibly take place.
WWE's "The Informer"character writes "WM29 is locked in for N.J./N.Y., but plans are underway for the 30th Show of Shows. The location? Let's just say it's a city of 'Olympic' proportions."
The summer Olympics are taking place this summer in London.