Richard Donner isn't dropped by the producers during Superman II. This means that the, if the Newman's are hired again, Donner can edit their script with Mankiewicz, cutting out what they saw as 'distasteful'. Pryor's character isn't forced to under go so much slapstick thanks to this, however Donner will be forced to co-direct with Richard Lester, the man responsible for the slapstick. Whilst Superman III ill be a good movie, Donner will get sidelined from production when it comes to Superman IV, which will end up being the Superman III of the series. Gene Hackman might also appear and give a better villain.