1a. Never mentioned 3000 sith before.
1b. I fail to see how this has the slightest chance of shaking up the galaxy. Reasons:
3000 is a very small number.
We have 3000 sith vs. 1000+ Jedi. However is 3000 sith are such a "ground shaking" event then the Aesir would most certainly become involved. Which would then mean the 2000 advantage the Sith have disappear in the blink of an eye.
1c. I really hope this is not it to the plot line. A small army of Sith suddenly appear and then a small army of Jedi appear. A little too convient, and a little disappointing when there are so many possibilities.
8: Since when? Jedi always interfer in non Jedi issues. And the Jedi may think that the ability to destroy a planet is insignificant to the power of the force, but that is probably all.
Most non-force users would probably say the exact reverse...
"Dulce bellum inexpertis."
Official Forum Expert on Norse Mythology
As Odin says in the Hovamal:
"Praise no day 'til evening; no wife 'til on her pyre; no sword 'til tested;
no maid 'til bedded; no ice 'til crossed;
no ale 'til drunk."