I don't know. As far as we know the 8 tails character is completely different. The Kyuubi is the strongest Tailed Beast there is. And even if it is sealed I doubt that he would "take orders" from his host. The only times he actually helped Naruto was when Sasuke smashed Naruto into the ground. I doubt he would NEED to be able to control the Kyuubi at this stage. He already combined Sage Chakra and Kyuubi chakra as you could see when he talked to Nagato