First, the game is tomorrow, 28th of March. So after that, no use giving further ideas.
Alright, so I have been called to run a simplified game of DW as a one-shot. 6 players, half of whom have never played an RPG, nor are they particularly savvy of the 40k setting. The other half are at least quite aware of 40k, and have played in a full DW campaign before.
(to be fair, selecting DW was my choice, I was looking for a game where, at least at the low power levels, player success was pretty easy, but against more difficult challenges could lead to a tenser game)
To this end I'm opting to really go with the Final Sanction demo rules, but I don't think I'll have time to squeeze in the entire FS module (also, my original 3 players have run through a modifed Final Sanction scenario (different state of the inquisitor), so I would prefer to not re-use things they've played before).
It likely will be a genestealer infestation, mainly because that allows for mixing both difficult and easy enemies (purestrains and genestealer cultists), as well as having a nice final showdown with a broodlord.
My current train of thought is to have the kill team drop pod onto a planet as part of a scheduled check-up on an inquisitor that has failed to report in (and had a contingency to have a DW ship check up on them just in case). Upon arrival in the system they do detect an emergency beacon going off on planet, and long range auspex scans have picked up fighting on the ground (no intel on who/what though).
Instead of using FS's Lordsholm scenario where you're trying to rescue the planetary government and otherwise stymie the entire rebellion, I'll likely focus on the missing inquisitor/broodlord hunt. I'm consuidering using the tile terrain from my Space Hulk copy and call it the interior of some manufactorium.
Anyway, repeat the same sort of into combat seen in FS, drop pod down to a small settlement for the works of the manufactorum, find a unit of allied forces under attack from genestealer cultists (traitor PDF), and upon victory be informed by a surviving acolyte of the inquisitor (who was left to manage the forces and set off the beacon in case) that the inquisitor was investigating activity in the manufactorum complex.
KT then is predicted to move into the complex, maybe offer a few different options/ideas on how to get inside, and then from there run the facility like a giant maze. Locked doors, occasional encounters (purestrains coming through vents and such), depending on how the party seems to be doing.
Encounter with the broodlord would occur in one of these rooms, and maybe have some sort of environmental issue where if the players are too reckless could cause major damage to the facility (e.g. set off explosions). Either its a running escape as its blowing up or a direct fight with the broodlord. Inquisitor is obviously dead already.
Past that alot of it is planned to run by seat of pants, and having to deal with rules questions from people who are new to RPGs.
Still, seems like I could add a bit more interaction. That or having more detailed possible scenarios for inside the complex (or on the how they get in side of things).