Well, Kurama is sort-of lying to himself thinking that it won't happen. He knows it will, yet he's just using the whole "I'm boared and don't Madara controlling me" vibe to cover it up. I have a feeling Naruto will loose the Kyuubi soon, though. That would suck since things are finally going off on the right foot, but I think they'll suck out the Kyuubi to show the ten-tailed beast. I mean, you know they have to. If Naruto somehow survives or is resurrected, then he'd probably pull out "that jutsu" to compinsate.
Looks like they will, and I don't think that Naruto will lose the Kyuubi, but it would be interesting if he did because with all Kishi is showing us about Naruto wanting to save the tailed beasts n what not it would force Naruto to become stronger on his own to save the Kyuubi.