I wonder if anything from Avatar and the humans fight with the Navi could be used? I'm thinking more "aftermath" of a battle than during.

Isn't there some scene in the extended edition that shows arrows in tires and some burned out vehicles?

What's that movie called Emerald Forest? Does that have anything?

EDIT:

Bingo, here might be something with Jjejerrod in command and covering up stuff.

So in the existing cut Vader goes to the DS and visits Jerjjerrod.

Maybe instead change some(no need for all) of the dialogue so instead Vader mentions the cover up, or that Jerjjerrodd hasn't been upfront. Vader is no schlub. He can figure out when he's being misled.

So Jerjerrod goes on to mention the moon being ready( for what I don't know: resettlement of Coruscanti as that planet is overpopulated and the citizens are growing restless?) and that the "savage creatures" will be crushed.