For the two you cited, ok.
Was there an AG for Prozac? That was a whopper for Barr Labs.
The example mnta likes to cite is Propofol, no authorized generic and a $ split of the market for years.
Personally I think even with an AG, generics with FTF status make a windfall with these blockbuster drugs.
I don't agree with zipjet that sanofi would be worried about M118. I assume Sanofi's decision would be based solely on what's best for Sanofi today, i.e. do they make more money with an AG or without an AG?