Do you think the kyubi and Naruto are ever gonna co-operate?
If so which moment do you think this would happen and what are your ideas about the powers Naruto's gonna have and his capabilities?
I don't know, the Kyuubi holds a grudge. 16 years later, and he still wanted to rip the flesh off Minato's bones when he saw him. However, the Kyuubi respects power, which is why he gave Naruto chakra as rent back in the day, pre-time-skip. Despite this, he's always trying to break free, so trust is a huge issue.
Also, Naruto has that special ability to make people make friends who want to sacrifice for him. I think it's something special in his chakra, which the Kyuubi is stealing, so he might come around.
As for abilities, breaking/canceling genjutsu, shadow clones, tailed beast mode and tailed beast bombs. Killer Bee already has this, so it would be boring for Naruto to get it too. I like his current RKS mode appearance. Plus, right now the Kyuubi chakra is his, if they share, I'm not sure if the MS Sharingan becomes an issue.