Last year the events oda talked about in jump festa happened in the second half of this year ie shocking news from reverie and oden's big story..
Those events started from august 2019 so if oda does the same as last year,then the sabo,vivi and hancock thing may only happen in late 2020 maybe after the end of act 3 meaning act 3 will really be the longest act of wano.
What is Nice to hear is that sabo is alive and not dead as we speculated in chapter 956.