I am afraid that if there would be a prequel of him, the quality of the movie might drop dramatically, as the producers would start milking the franchise.
The producers apparently said there will be prequels, especially of the games (so haymitch could have his with the second quarter quell). On one side, i'd love this cause praise haymitch, but i am also afraid they might change everything from how the book described it and make a huge mess to accomodate the changes they had already made in the movies (for example, haymitch had allied with a girl, the original owner of the mockingjay pin, who was the aunt of katniss' only girl friend... Not having featured the friend in the first movies, would they change it so haymitch ally was someone different? Would she have the mockingjay pin? Would he even have an ally at all?)
Lionsgate is having talks about making prequels. I think they'll probably do it, but I could be a few years down the road. They did some photos of the previous victor's games, including mags when she was young.
and you have your drunkard asshole (archer-hamitch)