I disagree simply because Momo would SURELY state something like: "I'm not yet deserving to be Shogun, I will find out the truths of the world, just like my father, and then I will come back and take the seat"... just like his father, and I daresay that he will entrust the place to one of the retainers... OR if Oda pulls a Pell with Yasui, Yasui will be temporarily shogun LMAO, but he should be dead, so it must be a retainer for some time