SoM Character to TBC then Wrath... then retail?

I'd like to start a character on the SoM Classic and work my way through Vanilla completely. Then afterwards, I'm assuming we'll get sent to TBC. From there do you all think we will be able to choose to move to Wrath?Do you think we'll ever be able to move our character into Retail? Im assuming they will stop at Wrath? Do you all think they will continue to Cata?