It wouldn't seem right seeing a young Vito without De Niro, this is why i wouldn't want flashbacks if they made a GF4. In fact i not sure i want a GF4 anymore.
If de niro packed on some weight, altered his speech a little and had a good amount of makeup/ special effects i think he could make an amazing Vito in the 30s. Special effects have gotten to a point where you can make anyone look like anything.
