What if Naruto 's new power up is that he can merge sennin mode and kyubi mode my mixing nature energy with Kyubi's Chakra......""""THE RIKODOU MODE"""..............
Naruto did it against Nagato's chakra rod,When the rod pierce Naruto it cut His Chakra leaving only Sage energy Kurama chakra took the place of Naruto's chakra and combined with Sage Mode Naruto's eyes Had both Sage and Kurama's eye shape at the same time and it stop Nagato's power and made Nagato coward in fear as the chakra wash over Him. So it has Happen ones.