Dont think it will land in the capital, the Shogun palace have a Poneglyph and the mysterious dolls that Brook have seen, that are the same that Tengu collect(pehaps he is Sukiyaki), and i think both will have a place in the storyline of the Arc.
And there's hints that Momo powers could stop the Island from falling and move it to a place where it will not hurt anyone, and after that we can get some cool fights in the different climates of Wano