That actually makes a lot more sense to me. I don't know what Mike might be planning but given the title, he's wanting an erotic game. Still if players are willing, the game could go in the direction that the Imperium has recently discovered the xeno and heretic tain covering his planet and dispatched forces to bring it back into control. Given its location on the edge, few forces would make it quickly, allowing for a mixing of races given the conditions.
We could also look at cooperation between forces towards a greater goal, Imperial institutions set on hold for the reclaiming of the system. Just a thought. I am not leaning on war here, merely trying to give it a good back story given the trends of 40k.