Good question. I'm curious!!!
It's possible though. But that would technically mean that if anyone with normal eyes would summon it, the Juubi would have his/her eyes. But even so, Madara's and Obito's eyes are 3/4 Rinnegan at the moment, so why wouldn't the Juubi's eyes be a Rinnegan? I think I just disproved myself...
Edit: As Creedo said, I think they are all the dojutsus in one. Has the Juubi's eye been shown on a color page yet? Cause if it is like gray/purple in the anime, then it most definitely is all of them combined.