Actually, when you throw Kabuto into the equation, here's what I think will happen.

Jiraiya and/or Tsunade kicks the crap out of Oro. Oro goes back, an even bigger gimp than before. Kabuto takes the initiative, and finishes the job.

Keep in mind, even without his jutsus, Oro is damn strong - maybe so strong, that Kabuto needs to keep his guard up.