This is bound to happen once we knew TBC is coming out, and I doubt blizz is going to let that opportunity slide (unless they close wow for good).
So, what is your situation? Pick a pool option and respond why.
(some explanation about pool options)
pserver = any kind, not necessarily wotlk - dont advertise, just be honest
switch to Wotlk classic = your main focus will become wotlk, not necessarily abandoning pserv/retail but playing less - at least during the wotlk content schedule
only check out Wotlk classic = similar to above but you will still be playing pserv/retail
For the record as much as I am not interested in TBC, and played wotlk very little I am hyped about it. So there is no nostalgia here.