GarioGaluigi
This is how I want "Star Wars: the Old Republic" to end. Essentially, it would be a series of bonus chapters like the HK-55 bonus chapter. These chapters would be started by talking to one of your droid companions in your stronghold. Cartel market companions would be excluded, so that's M1-4X, T7-01, SCORPIO, HK-51, HK-55, and Z0-0M. The player droid would be the one you spoke to, and the companion droid would be determined by a dialogue tree. No matter who you chose, you could set any of them to any combat role.
After you'd played as ever droid at least once, used every droid as a companion at least once, launched the mission from every player class at least once, and launched the mission from every stronghold at least once (doesn't have to be your stronghold) a final mission opens up at Centerpoint Station. More on that later.