One of the hardest parts of this particular setting I'm coming across is knowing what to put into the setting. With such a mish-mash of cross genre, it really comes down to what I want to portray and how I want to portray it. This isn't like creating your standard fantasy game. This game requires more, I think for the beginning I'll use the 'brick' aspect of space travel between planets to make it the "redline" in the Indiana Jones movies, that will allow scene changes without creating complicated space battles. Travel thru MaX Gates becomes a story tool, a red travel line across the solar system map, between terrestrial settings.
Here's the crux of the design ideas:
Pulp
Noire
Dieselpunk
Pulp Space
Pulp Mars/Pulp Venus