Concerning the films only.... Just for the extended edition of Return of the Jedi, but do the Celebration scenes on Coruscant, Naboo and Tatooine make sense at all, and this is with no inclusion of the EU besides what we see in the films. Does it make the universe kinda seem small, and it would practically make the entire Imperial military suddenly be at Endor and all die there, at least, a significant portion of it for those celebrations to happen.
I figured there was a revolution after news of the Emperor's death reached the galaxy, and the people of the galaxy rose up and drove out the Empire. I also assumed the SE shots were taken a couple of months after ROTJ
Tatooine, I'm not sure about. Why should they care? The Coruscant one I'm fine with except for the fact people think that the Empire was defeated shortly thereafter. Coruscant is the heart of the Empire. The Army, Navy, Intelligence and whatever else is there. A Galactic government falling by the wayside? Especially on its main planet? Don't you think that someone would rise up and take charge?
If one is to try to understand the endings.....one must first ask why are the celebrations happening? Then and only then will you understand the meaning.
Jabba the Hutt was killed. We can assume that he was the most powerful of the Hutts. And we only see one of the main cities of Tatooine, which surely has more contact with the rest of the galaxy than the rest of the planet. The idea is that, once the main ruler of the Empire is killed and most of the military forces have been defeated, the regime is over. Specially if the Emperor was the same bad guy who created it.
Master Oierem, are saying that these celebrations happened because the Alliance had defeated the Empire?
I think this question can be answered by the fact that Georfe Lucas simply doesn't give a crap about the EU...or how rebellions and uprisings work for that matter.
ANH seems to be the first time Luke has ever been to Mos Eisley, so I think it's easy to buy into the idea of the city as a different cultural climate to the rest of the planet. Plus Tatooine takes a lot of cues from Westerns, and it's pretty common for Westerns to end with the untamed land finally being tamed thanks to railroads, big business, and politics, so it seems reasonable that the planet wasn't quite as unconnected to the "center of the galaxy" by the time of the sixth episode.
It's not like the Imperials weren't ever present in Tatooine. If you remember, in A New Hope, Imperial Stormtroopers made a whole mess of things; killing an entire sandcrawler full of Jawas (Plus, how do you think those Tusken Raiders felt getting framed for killing them? ;P I joke on that point), killing two innocent moisture farmers (Owen and Beru), setting up checkpoints at the Spaceport as well as shooting it up. Tatooine makes sense along with the rest of the planets. All of them have one thing in common; the Empire came in and bullied all of them at one point or another.
Jedi SoWizard makes a good point...the common....the Empire bullied them.... So that could be a fairly good reason to celebrate...at least for that moment in time. There could be another possibility. What if they were celebrating New Years!