Interested in a Warhammer 20K? and an alternate 40k universe?

[Broodingman87]

I was talking with a hobby buddy about 30K when the idea came about to go even further back, into the dark age of science. Experience the galaxy before the fall of man, the age of strife, declaring science heresy, etc. or would it be too Star Trek meets Starship Troopers, with a little dash of Halo?

And since we're on the subject of 20k, the thought just occurred to me about a re-envisioning of 40k by just changing one variable... what if science was not declared heresy? With the birth of Slaanesh, the awakening of the Necrons and the arrival of the Tyranids, the story could be just as dark, but now a "proper" science fiction and not "Lord of the rings with guns", lol.

Let me know what you think of these questions/Ideas?