Thinking Out The End Game

About 2 years and 3 months ago I started running a Star Wars game using the new Fantasy Flight Games system. The game is still going, but the PCs are higher XP than I think the system was ever designed to handle. Beyond that, the plot has progressed to the point where we're fast approaching the end game. The problem is, I figured we'd be going into a last arc which could go a bit before the end. Then I played out the events from a different perspective and realized that there are several potential end points coming up, and I have no idea which one we're going to. This is a good thing, but it's also something I want to explore a bit further.

Events Don't Happen In Isolation
The problem I had was I looked at events from only one perspective, how it would impact the PCs going forward. I didn't think about how the other factions involved in the story would react except for to do the thing I wanted for the PCs. Not a bad idea. It lets me focus on the events and making sure they can be fun for the PCs.

However, it makes for a bit of a shallow story. It's good to have in place, but I owe my players going further than that.

Shift In Perspective
The trick here is to go through the various factions and also play out what is going to happen. I can't go into details as too many of my players read here, but at least one big faction is going to be breaking up over information they have. Now how that plays out for the PC side is easy and thought out. But what about the rest? How does the Empire take the reveal? How do the major systems? How does the Criminal Underworld take it?

When the shake up happens, will someone open a vacuum? How will people try to get their hands on what they can? Who ends up holding the reigns of power when the dust settles? These are all questions I need to be able to answer on a faction by faction level, and they all need to be answerable both with and without PC interference.

The End Result
The end result of this thinking is that my PCs are now racing towards an arc that could end in at least 3 different ways, and that's before I let my PCs loose on the matter and see what ways they find. Hopefully it'll be exciting, but maybe it will be anti-climactic. I guess only time will tell.