So, even though I can't start the fic for a while, I've gotten it all plotted out. It's going to be entirely from Ford's perspective, and it's going to go from "Not What He Seems" to "The Last Mabelcorn."
Why not all the way up to finale? Because I need to completely rewrite it. "Dipper and Mabel vs the Future" will go completely different, which means the rift will have to crack in some other way. So, a complete Weirdmaggedon overhall. Not to mention, it's going to be split perspective, so, it gets its own fic.
For now, though, until I figure out more details you can ask questions about what will happen. Even if I won't give all the details because of spoilers. It's loosely drafted enough for me to be confident in answering questions, though.