I doubt Kakashi will ever get the chance to fight Kabuto, During the Konaha Crush what he said to Kakashi about even if I show the slightest of hand you'll just copy it and that he's not as good as the Uchiha member's with it. When he said that it made me think that when Itachi faught against Oro, Kabuto must have had some hand in the fight but got his technique's copied and turned against him. That's my reasoning behind him alway's running from Kakashi.