[blackadder]

Ah, Dr. Kain. Just as annoying in here or HJU.
BTW, if Ryuuga is Kouga is Kouga's son, it would make the Hagane no Hoko (Hagane's roar) short story that was released in 2006 non-canon. The short story is set in the future and featured Kouga and Kaoru's son Raiga (雷牙). Or maybe he changed his name or something. I'm tempted in buying a used of copy of the mook carrying the short story in yahoo auction, but it cost around 50 dollars minus shipping.