Just gonna ramble a lil about aonishiki and throw some opinions out there. He's still a raw and inexperienced wrestler who is achieving 11 wins even facing the best wrestlers. He has a lot of room to improve and he will, both physically and mentally. I believe he will be a wrestler that always achieves double digit scores at a minimum (as long as he's healthy, touching wood) because whilst he may struggle against big guys like onosato, he's still good enough now, even as raw and inexperienced as he is, to beat enough of the rest.
It's only a matter of time before he picks up a yusho. If he can cut down on his losses against lower ranked guys which he probably will, he will steal a yusho here and there.
Even if he never manages to crack onosato, I believe eventually he could become yokozuna but it will take a little luck i.e. onosato picking up a few losses. But this will likely be in the more distant future. I think he will be ozeki for a little while