Crossover Episode?

So theres only 3 save files, right? What if we can make them all connected. Like each save file they're set up on different maps and you can visit a separate group you've created on a different save file. You cant join them or anything but you could share resources and have them as followers. You could even kill them if you're about that life. Like have a little back and forth. Play as one community and attack the other, then switch to the other community and shoot them up a little.