This may have been suggested!

Seeing the cata realm being around 200 people on. How about making it a vanilla realm? I know some will say theres plenty of vanilla servers out but that would be great to have a vanilla here! This server would easily bring people from other places! or even a TBC would be just as good!

"A new realm - We will not be creating new realms at this time. This includes PvE realms, more realms to reduce the amount of queues, or new realms to support new or old expansion packs."