we know that naruto who is the host of the 9 tails gets some of the nine tails chakra we see the eyes of the 9 tails in his eyes:
we also see shikaku's eye when gaara's possessed during their matchup:
now although its not the same with gaara and naruto we never seen bee's eyes like the 8 tails which doesnt matter but what i concluded is that whoever host the 10 tails will get these eyes and with that a new power.
Notice that when rikudo sennin is shown as the host we cannot see his eyes his back is turned
it would have ruined the surprise:
the juubi being the creation of everything obviously has both senju and uchiha dna in it
and when you mix those two you can cast a stronger genjutsu:
so we can also conclude that madara's intentions are true... just adding that in there