Before Phantom Menace and midiclorians, before Indian Jones and the fridge, there was Godfather III and Sophia Coppola's acting.
Back in the day, Godfather III was the cultural disappointment of its time, with a lot viewed as too out there, poor acting by Coppola's daughter in a lead role, and so on, and was considered the weakest of the entries in the Godfather series. It's reputation has improved in time (likely in the face of the far, far worse follow ups to franchises that came a decade after it was released), but it is still not considered anything near the rest of the series.
The challenge, therefore, is to make Godfather III good. You can edit the elements of the film as it came out, or completely start anew with what they should have done. Keep in mind, too, the studio approached Coppola for decades to make Part III before he finally made it, so there is a lot of room to ask what if he had made it at another point.
Back in the day, Godfather III was the cultural disappointment of its time, with a lot viewed as too out there, poor acting by Coppola's daughter in a lead role, and so on, and was considered the weakest of the entries in the Godfather series. It's reputation has improved in time (likely in the face of the far, far worse follow ups to franchises that came a decade after it was released), but it is still not considered anything near the rest of the series.
The challenge, therefore, is to make Godfather III good. You can edit the elements of the film as it came out, or completely start anew with what they should have done. Keep in mind, too, the studio approached Coppola for decades to make Part III before he finally made it, so there is a lot of room to ask what if he had made it at another point.