Originally Posted by
flekkzo
The God-Emperor of mankind already has descendants. They are called Primarchs and Space Marines. I think that's good enough really.
If GW wants to "revive" the emperor it would mean a new set of unification wars within the Imperium, and a healthy dose of overkill to eradicate the parts the emperor wouldn't agree with (which is, a LOT outside the Space Marines). I think that could play well with the current state of our real world, just with the idea of one real hero for mankind. Also it would put even more emphasis on chaos as the enemy, and if we could get three equally large factions (at least in the codex sense) in Imperial, Chaos, and Xenos, I'd be happy.
Then again I'd settle for anything new happening. At least move into the next millennia properly. It's 40k for 10,000 years, use those!