We had a planning session on 26th February 2017 and very quickly my plans were totally derailed.
The new plan is to lean heavily on the Radio Star Weasels idea for the player character's homeworld in this Rogue Trader game. The first arc will focus heavily upon the homeworld and the cold-war arms-race style effort to be the first to launch their flying fortress ship first. This being the Grim Porpoise for the player character's faction. The second arc will be "furries in space" and we'll see what happens.
Luckily this idea is so separated from my initial plan of "do a vanilla Rogue Trader game leaning upon the modules" that I can still just do that as a separate campaign.