Added more detailed plot bunnies...
Hunger Games Revamped
I've been craving a different sort of Hunger Games ever since I watched Catching Fire. I have images of alternate endings to the games.
There is a world where Peeta didn't survive the games, perhaps he died from the infection or berries, he commits suicide so Katniss can live, or the Gamemakers do something to kill him so only one survived. Or heck, perhaps he turns on her partway through the Games and she's forced to kill him (which could bring forth other ideas like him working with Cato to break the Girl on Fire). Regardless of how, Katniss is the sole winner of the 74th games. There are several things that can happen next: she's falling into depression and alcoholism just like Haymitch and a mutual understanding develops a relationship. Because she was too bold in the arena Snow still needs to control her and decides that the Mockingjay can make him money being an escort using her sister as leverage to behave, again Haymitch can be there to help her cope but Finnick would be good too considering he's been there. We could play through the year with Haymitch and Katniss going through the Victory Tour and the next Hunger Games as mentors together.
Another option is what happens after the Mockingjay is changed. Maybe Peeta doesn't survive or is too insane to come back with her. Katniss falling into her depression and Haymitch being her mentor and basically caretaker at this point having to pull her out of it. Or maybe they don't win the Revolution and Katniss is made an example of by being abused, Haymitch is forced to be there as her caretaker after each time as punishment, seeing his Mockingjay torn down.
Or we could play where Peeta does survive and they are both abused at the hands of the Capitol to break their influence.
Anyways, there are tons of possibilities and for some reason I've been having a craving for Haymitch/Katniss lately. However this is a universe that I could see creating original characters for, playing years before Katniss and Peeta started the revolution or after their failed attempt.