Al Pacino is supposed to appear in GF IV before he dies, and the GF IV scripts are already written I doesn`t mind if Mario Puzo died, because he left GF 4. Of course, GF 4 must be the last movie, if you want a GF 5, well, it would be trash, and I don`t think Mario Puzo wrote the script hahaha. Of course in that case any hope is dead, but GF 4 should be made. If the scripts are written there is no discussion, Al Pacino said he would appear, so, I don`t see any problem.