There are 3 options imo:
1. The server stays dead and nobody will try it out.
2. There a slight chance an amount of 30 people will check it for a month or so and move on after.
3. It'll be a hit and people will start playing Cataclysm again and by the time Ryan and Jordan start racking up donations blizzard will close the server.
From what I've seen in the past year and the current one, the idea regarding the private servers is that the expansions after wotlk are faeces and everybody wants to try the old vanilla-tbc experience.