“Mythic Entertainment announced they've acquired the license and are developing a massively multiplayer version [of Warhammer] planned for release in 2007.”
PC Games: E3 2005: Warhammer Online
Came the complaints like this:
“Why aren't they making a 40k MMORPG! It would make more sense to have a game in a time period that hasn't been exploited to the fullest by other game companies. Being a space marine in the grim future where there is only war would be TIGHT!”
Mythic Acquires MMORPG Warhammer Rights
Whereas I would suggest this is the only option...