We have heard this thing time and again from Robert Rodriguez that he intends to shoot Sin City 2 before his career recedes. The film has been gearing up in production for some time. So this might be the final word on the franchise.
It will be based on the books by Frank Miller called Sin City. Robert had this to say
“Frank Miller and I are working on it. It’s slated to be the next one.” “But if the script is not ready, then we’ll have to move to the next one.”
Sin City will show the return of Bruce Willis into the series. There is also a chance for Sin City part three as well.