Well considering how the black portion of his eye is abnormally big, I’d say that it’s quite possible.If this hasn't crossed your mind at least once then you must be an anime only fan. What do you think of Jigen's dojutsu?
It’s also possible that he pulls an Urashiki and pops a Rinnegan out of nowhere.I agree with him having a byakugan but I think its at least rinnegan level. There was a point in the last chapter when he had three high level jutsu activated at the same time.