It would'nt be purchased by one company. TVA would be broken-up and sold off, most likely to geographically positioned utility companies.
I can't see all of TVA being auctioned off, but I could see .gov shedding some of the non-core assets. I don't see the nukes going anywhere, but maybe some hydros, dirtburners, or land could be in the cards down the road. Nothing that other utilities don't do now.
I was just wondering if any of the TVA folks had heard about any of this and had the scoop.