A lot of folks are missing all the stuff that was 'inspired' by 40k (as in Warhammer 40,000), which in turn had 'borrowed' a lot from other sources, just like most of the IPs this movie was 'inspired' by... Which I kinda find ironic.
Is it a great movie? No! But it was interesting, like the little engine that could... Not... Most of it was fine, I can even stand a lot of the stuff that folks here found horrendous. But there was often something jarring and I can't really put my finger on it what it was. I'm certainly not watching the movie again to figure it out, but I'll watch part #2.
Some parts really gave me a feel of Lexx, a kind of 'clean', but disturbing vibe.
I suspect that if someone ever compiles a list of all the 'inspiration' source, a lot of us will go "Oh... Yeah! That tracks.".