I also had a thought about the NPC's...maybe at one point there breaks a fight between our four Main Districts and a few of the NPC's by the Cornucopia and they start that spin-clock thingy like they did in the second film :)

Maybe one or two of the girls get hurt, during the whole process and the other main characters/main NPC's save them...and they form a sort of an alliance...but the alliance gets stronger when the Rebellion starts, after they save each other a few times.

We could also decide, if there's any NPC's we might wanna kill of during the games, the rest we can keep for the Rebellion :)