Even if they do have the Rev compatible controls, they're still gonna release AT LEAST a few months before The Rev launch. If they release it in tandem with the Rev, then what was the point of even keeping it on the Gamecube?
Really, I'd say April or May is the most likley...and just think, if they release in April, then TP will be playable with Rev controls at E3.
Which...now that I think about it, is possibly the entire reason they added Rev controls in the first place.