Assuming that wasn’t rhetorical, I expect him to win the League next season, with the other domestic pots secondary to going further in Europe. As for players, I expect him to reinvigorate old hands (e.g. Foden, Dias, Lewis, Haaland, Gvardiol, Savinho) and push newer players to fresh heights.
I expect the club to give him time- my expectations are lower for the fans, and I expect him to eat, sleep, and drink the club. It is very difficult to follow a larger than life character, Guardiola is more akin to Shankly than Ferguson in that regard, but Paisley showed what can be achieved when the culture has taken root. In short, Great Expectations.