when i say figured out i mean like Phoenix23 said. biological experimentation, remember when sandaime goes down and sees orochimaru's experiments and then he runs off. it's possible that orochimaru has already figured out some bloodline jutsu.

why would the cloud want the hyuga if not to figure out the byakugen and their jutsu's.
orochimaru wanted kimimaro's body, and you see kabuto and orochimaru talking (can't remember where) and kabuto said if he had more info he could figure out the secret (something like that ).