I guess there isn't necessarily a big bad villain this season just everyone going to a end point. I'm sure Bill will be on his death bead so to speak close to the last scene and he'll get saved at the last minute. And then the Yokohama or whatever corporation will synthesize Sarah's blood into a new True Blood formula and cure all the vamps and be back on top also it will make it so they are immune to Hep+V so feeding on random humans will no longer be an issue. And everyone lived happily ever after.

I do wonder whats the plan with Violet and Adalyn and ol' dude tho.