Necron war in heaven I suppose, because I feel the necrons still have potential despite Matt Wards dabbling in their lore. I want to turn them back into the scary death machines they were once known for!
How about a Street fighter style beat em up featuring primarchs and the most famous Wh40k characters? Sanguinius vs Horus -round one!
Speaking personally I would wish to see a title focusing upon something more overlooked by most video games set in this universe - the cult uprisings and power plays. Thus far we have seen a major focus placed upon frontline battles and warzones, but little has really been done to fully explore the threat of Chaos as an internally corrupting force or the machinations of other races. The game I would envision would see one of three things. An Inquisitor investigating strange ongoings on a hive world, an Alpha Legion agent operating to build a cabal out of the local population for some unknown reason, and an Farseer manipulating both ends against the middle to ensure the best outcome for the eldar race. Each would be playable and the full story would only be told upon concluding each and every one, possibly with one final ending revealing a twist of some kind or an epilogue after all have been finished. Being a game of this type, it would likely work best as a point and click title with RPG elements or something comparable to some of the better elements of Telltale Games' better known releases. Combat would be an element present in the game but more of it would be focused upon investigations, managing resources, minimising security breaches and ensuring that they went unnoticed as much as possible.
Oddly enough it was a Xenology style necron infiltration/manipulation or a slow invasion of the planet by the Tau Empire which I personally had in mind for the epilogue.
You're a simple Imperial citizen on a Hive World, it would be an RPG, and progression would be largely linked to how you choose to raise above your station. So, if you become Mechanicus Adept, then you augment yourself, join the PDF or Guard to get gear, or be a criminal and seek the favors of Chaos to give you power.
1. A third-person legion of the damned vs daemons, chaos space marines, grey knights 2. A tyranid based game called Hivetyrant, 3rd person shooter/ stratgey, mass effect style 3. Ravenwing, 1st person storyline of hunting the fallen
