Amazingly, the silly notion that it might be economically feasible to convert the Astrodome into a Gaylord Texan-type convention hotel has been making the local rounds for over three years now.
Maybe the combination of the Texans and the Rodeo coming out against the proposal will finally put the nonsense to rest. As the Chron article notes, even County Judge Ed Emmett is skeptical about the merits of the proposal:

County Judge Ed Emmett signaled in September that he isn’t convinced the project is viable. While attending the Texans’ home opener in September, he said the Astrodome struck him as an aging, rusted-out battleship that remains in a spruced-up port.

It occurs to me that the Astrodome hotel promoters decision to obtain a financing commitment for the project before getting the consent of the Reliant Park tenants to the project put a very large cart before the horse. Sort of like Oilers’ owner Bud Adams unveiling a model of a proposed new downtown football/basketball stadium back in the mid-1990’s without telling Rockets owner Les Alexander and Mayor Bob Lanier about it first. And we all know what happened after that imbroglio.
All of these machinations over what to do with the Dome would be relatively harmless except for the fact that the Dome continues to “eat” — that is, it costs Harris County a hefty sum (probably at least $3 million or so annually) just to mothball the Dome. Hopefully, the opposition of the main tenants at Reliant Park to the hotel redevelopment plan will finally lead to the Dome property being used for the best land use, which is probably parking. That’s not as sexy as a big hotel, but it provides something that is actually needed and will generate some revenue.
By the way, a good sign that a project is almost kaput is that its supporters become delusional. According to the Chron article, that’s already happening to certain promoters of the Astrodome hotel project:

Willie Loston, director of the Harris County Sports & Convention Corp., said the county attorney’s office is researching whether the county could approve the project over the objections of the Texans and the rodeo if the sports corporation determined the development would not hurt their operations.