Hey thanks. The background for the whole campaign is the growing tension between the Naboo and the Gungans, with the splitting issue being the Empire. The Naboo support the creation of the Empire because Palpatine stopped the war and has sent large amounts of supplies to rebuild worlds devastated by the Separatists, Naboo included. The Gungans don't like the Empire because they've made several subtle and not so subtle efforts to seize control over the deep sea plasma mines (the blue stuff that came in orbs. It comes out of the deep sea crust, and the Gungans use it to power their everything) to build bigger mines at the cost of wrecking the ocean so they can build power plants and ship engines and stuff. Senator Binks gets called back to the planet early on to try and soothe tensions. Not long after that, the players uncover a Jedi Master is the ringleader behind the whole rebellion, so Vader shows up. That's when the scene is going to happen.
The players are part of the welcoming lineup for Vader, you know, where everyone crowds into the hanger and forms rows near where the shuttle lands. Jar Jar and the Imperial general are in the middle to greet Vader when he arrives. The general gives him the situation while Jar Jar is silent and stone still the whole time. When they leave, Jar Jar gasps for air, wheezes and collapses while the players and other troops files out. Later on, depending on things go, after the party has razed a few Gungan villages with disrupters and flamethrowers, he might get a fatal dose.
After that though, I'm sort of at a loss to where the next campaign would be.