Anyone remember how it was said "It won't happen!" about Classic servers? I remember, I used to think so.
Now that Classic servers are here and there's literally a separate team working on it, I would not be so swift to say definitively that Classic+ won't happen.
Sure, there is the Ion statement that Live is the place for a changing world and new content, but even if Classic can retain 200k players, that might be enough incentive to create some new stuff. Likely on entirely separate servers though, to appease the people truly wanting to run Naxx 5000 times.
Or, they'll just do TBC servers. Or, they'll not release more legacy servers at all. At this point in time, they haven't said boo about anything beyond the finalization of Classic's release schedule.
Citation please.
Don't worry, I know for a fact that you can't provide one.
Considering Retail's many more servers (a Full Retail server has more players than a full Classic one) and the marginal changes in the server rankings across regions, I'd say this just boils down to the usual Classic tooting.
Also, WoW token + Store. 'Nuff said.