Here's a blast from the past: the battle of Mon Calmari from Rogue Squadron.
Part One
http://www.youtube.com/watch?v=peP3YztUXeg...feature=relatedPart Two
http://www.youtube.com/watch?v=EO-hMIry47c...feature=relatedIt's the very same one from the graphic Novel Dark Empire.
Visualise how a new one could work:
Mon Calmari may look alot closer to Kotholis from Rogue Leader, only a archipelago with villages dotted around and this time there may be boats and turrets defending the cities too while Mon Calmari Star Cruisers (most likely reuses of the liberty and Home One) evacuate them.
The battle may extend further then this, in the comic, the Rebel Fleet arrives and faces a Imperial blockade, the Rebel ships were the same as the ones in the battle of Endor with Escort Frigates, Blockade Runners and Transports and in addition to these are captured Star Destroyers, and the Imperial fleet was a Super Star Destroyer and a few Star Destroyers. Toward the end there's a ground battle where Amphibions unload Rebel commandos onto them for a strike.