a Jade version sounds interesting, but it would almost be like playing on Emerald since they'd have to have a green legendary as well. They might not even come out with a 3rd version since the two legendary pokemon in DP mean Diamond and Pearl in japanese. If they made another version, they'd have to put it in DP unless it was a version exclusive pokemon. Then you'd end up confusing some people, unless you happen to have it be 1 above the highest one in the 'dex (as in, if the DP dex ends at 500, the 3rd version would have to have a legendary that's 501, and then there are the secert pokemon to worry about as well)
BTW, does anyone know where you can get the Diaruga and Parukia model things? (not sure if they're models, ceramic figures, or some plastic thing)