So I was playing wow the other day when I this idea came to me and wouldn't quit until I thought it through. Say Ranma was banish to Azeroth by Ryoga with a wish and he ends up in the WoW craft verse. I can see him being being weird out by his surroundings, let set the WoW timeline back to before TBC. Now as for landing I can see him landing in Darkshore, where his shape changing surprise the night elves making them thing he could be the first human druid. The fact that he use key a life like energy to his attacks would just further make them thin he's a druid. Then of course he'd have his cat fist after encountering the panthers the Sentinel ride and that would further convince them that Ranma is the first Human druid (worgen not withstanding) I can see Ranma learning to be a druid to tap into the energies of the earth and to also further his ki technique. I can also see him communicating with his cat side to gain a cat form and a flight form.
Now what I want to make clear is the ditizen of Azeroth are not your average push over and are very well verse in martial arts, Blood elves and Night elves specifically. I think Ranma could learn from them and he could from them, as for adventure we'll that's just the setting up adventure I have no idea.