The Astrodome Conservancy unveiled an ambitious $1 billion plan too reinvent the historic stadium, but two of the Dome's major stakeholders said Wednesday that they aren't buying it. They're working on their own plan for NRG Park.

The Astrodome Conservancy unveiled its plan for the future of the Astrodome on Wednesday. This is the latest attempt to do something with the Houston landmark that has been closed to the public for 15 years.

The Astrodome became the world's first domed stadium upon opening its doors in 1965. Financed and developed primarily by then-mayor Roy Hofheinz, the Astrodome served as the home of the Astros, Oilers and,