I don't think she was all that horrible, but it's clear from her interviews, etc. that Sofia has little interest in ever reprising the Mary character.

And a "grand flashback" scene -- what would be the point of that? Get Brando at the age of 80 to come back and wave at the camera? Caan and Andy Garcia to arm wrestle? Simonetta Stefanelli to do a topless scene to show us what Apollonia would look like at the age of 50?