TBC PvP and PvE server same timeline?

Hey,
First of all, are you planning on starting a PvE realm in TBC or only PvP? And if only PvP I assume people will be able to transfer from the PvE vanilla realm to the PvP TBC realm as soon as the PvP TBC realm launches? Will the PvP TBC realm start after naxx is cleared on the PvE vanilla server? Or if before, will people who are playing on the PvE vanilla realm be able to transfer to TBC PvP earlier?
I'm planning to start playing on the PvE vanilla realm right now but since it will "end" later than the PvP vanilla realm I'm worried that the PvE TBC realm will start later if there will be one. Or will they launch both TBC servers at the same time together? That would make more sense.
Thanks
First of all, are you planning on starting a PvE realm in TBC or only PvP? And if only PvP I assume people will be able to transfer from the PvE vanilla realm to the PvP TBC realm as soon as the PvP TBC realm launches? Will the PvP TBC realm start after naxx is cleared on the PvE vanilla server? Or if before, will people who are playing on the PvE vanilla realm be able to transfer to TBC PvP earlier?
I'm planning to start playing on the PvE vanilla realm right now but since it will "end" later than the PvP vanilla realm I'm worried that the PvE TBC realm will start later if there will be one. Or will they launch both TBC servers at the same time together? That would make more sense.
Thanks