It is expected that any new arena would also be located either on the Stampede Grounds or elsewhere in downtown Calgary. While NHL Commissioner Gary Bettman has lobbied on behalf of both the Flames and the Oilers for government support, Calgary mayor Naheed Nenshi and alderman John Mar have stated their opposition using taxpayer money to help fund a new arena. King stated that the Flames have concepts and designs for a new building, but are not ready to release them. Some of the plans being considered for Stampede Park would include lowering the city's C-train light rail transit line below ground and run straight into a new facility.