The rest goes according to formula...
Chaos by the landing platform. They could have the fathers of children and their mothers who are yet to be evacuated provide the security around the pads for some "humans turning on each other" action. It's a descent into hell. Scientists of the company. Opposing groups. The planet had a loose militia to discourage small raids from other human powers.
Bishop could come down here or later. The other android could be there. Newt would have to be drawn down and stuck. They could go on missions to rescue stranded families. It would all end with them making it back to the ship. They help each other against at least 3 aliens who have gotten aboard from another shuttle.
This would be between 105 and 120 minutes, so it's not as though there'd be any shortage of material ;)
With emphasis on the WWII analogy and the fact that these are not poor put upon creatures who are only trying to live in peace on their own homeworld, I'd be inclined to stick with a Libertarian versus Neo-Marxist divide (or at least I'd be too tired to try to find anything better;) The people who founded the colony might have had a get-away-from-it-all ideology. The N-Ms might be some descendants and recent immigrants sick of the company store. If there are going to be colonists, they have to have character and conflict. Polar extremes. They both should make good points and both be catastrophically wrong.
The Libs created a Wild West environment with drugs and prostitution surrounding their families, overdependence on the company and the idea that they can do whatever they like and be totally unprepared to deal with problems with their isolationist loose little militia. The NMs try to believe that their program would lead to anything other than an unworkable, Orwellian totalitarianism. They try to believe they can live in peace with any system other than Free-Enterprise and greatly admire the Marxist nature of the hive. These opposites could be embodied in their respective leaders for quick presentation. Both would die gruesomely, of course ;) Message serves the story- NEVER story serves the message!