Partial Source:

Several sources are saying WrestleMania 27 could take place at the former Skydome in Toronto, Ontario, Canada. If the event takes place at Skydome, it would be the third venue, along with Madison Square Garden and the Rosemont Horizon to host WrestleMania three times. WrestleMania 6 and 18 were both held in Skydome.

Miami, Atlanta and Indianapolis are also in the running, and an official decision should be made soon.