Why Makeb?

Well these are the Worlds that we actually saw saw from the 6 movies:
[list][*]Dagobah = Why? There isn't much of anything during this Era.

*snip*

Dagobah is actually prety interresting, if Lucas Arts permits, at least.
All we know is that it's a swampy rainforest 3000 years later. But during this timeperiod, it could actually have some degree of civilization. Think of bringing to life an Incan city deep in the Amazon forest, but then even older. Whatever happens there is not meant to last for more than a few hundred years. So about anything could happen, from an erupting volcano to a dinosaur killer meteor strike, or its asteroid rings collapsing the debris constantly bombarding the surface.

Just something will happen, HAS to happen. Enough will happen to hide or obscure any trace of the planets' civilization from initial survey scans 3000 years later. And whatever happens, it could make for a nice background for the story.

Well these are the Worlds that we actually saw saw from the 6 movies:

• Coruscant = Already in game
• Naboo = Barely a Starport and the Gungans are either fighting each other or are fighting the early settlers, not part of the Republic yet. Theed does not exist in this Era.
• Tatooine = Already in game
• Geonosis = This could be interesting place to visit during this Era
• Kamino = Would be somewhat difficult to create, but the ruins of Derem City does have Jedi Artifacts from Ossus
• Cato Neimoidia = Could be interesting but might also be difficult to create
• Alderaan = Already in game
• Kashyyyk = Will likely be added at some point, but it would be interesting if added to see how it looks compared to KOTOR 1, SWG, and the Movies
• Felucia = IF they were to add this, then it will likely be added with an Expansion that adds in (or more of) the Xim Empire as during this Era I believe it is still under the control of Xim's Empire.
• Mustafar = 40 years before the events KOTOR a massive battle took place which caused the environment to change, and ~340 years later I'm pretty sure that Mustafar would likely be still dangerous to explore.
• Dagobah = Why? There isn't much of anything during this Era.
• Saleucami = I don't see why we would visit this during this Era as there isn't any info on this World during this Era other then 6,100 BBY it was colonized by Wroonians
• Mygeeto = Only reason I can think of to visit would be abandon Rakata Tech and Crystals
• Utapau = I don't see any reason to add it into the game
• Yavin 4 = Other then the Sith Temples there, not much reason to go here as Naga Sadow's spirits & Freedon Nadd's Spirit have already been destroyed before the Game begun and we wouldn't be able to kill Exar Kun's Spirit as it doesn't die until 11 ABY.
• Hoth = Already in game
• Bespin = Cloud City doesn't exist during this Era so no real reason to add this Gas Giant to the game
• Endor = The Republic does have secret bio-labs here

So, of the Worlds that were shown/explored in the Movies, the Worlds of Geonosis, Kamino, Cato Neimodia, Kashyyyk, Mygeeto, and Endor would be plausible or be interesting to visit however Kamino & Cato Neimodia could be a bit too difficult to create for various reasons so Kashyyyk, Geonosis, Mygeeto & Endor would be the the ones from the Movies that would be the most plausible at being added.

- Malachor V

Endor at this time had nothing but a secret republic research base on it. So maby as an empire-only instanced flashpoint?
Certainly not as a full planet.
Kashyyyk would be recovering from the recent (relatively) slavery by czerka corporation and just tentatively taking its first steps into the rest of the galaxy. Needless to say they would hardly be empire friendly.
Geonosis could easily fit in. It would act as a sort of second Nar Shaddaa in being a neutral ground for both factions to scheme against eachother.
Mygeeto would either be under the control of the Hutts, Neimoidians or the Banking Clan, neither of which would let outsiders come to their precious crystal-rich planet...
So thats a no as well.

So out of all the movie planets, only geonosis would make any kind of sense.

But i still dont see why everybody gets their panties in a twist over getting a new planet instead of one from the movies.
Do you really want the galaxy to consist of 10 or so planets that are just re-hashed over and over and over again?

I think Yoda settled on Dagobah for one specific reason, and that being it's complete lack of anything interesting being there, ever, plus it being very badly suited for any colonization and exploration.