Cool 
One other thing actually, if you could take a look at. Directory structure and multiple assets which are the same. At some point, would it be possible to switch up the directory and file structure to something like:
Content
- ModularSciFiSeries
– Common Assets (materials, textures, meshes… things that are used in multiple packs)
– ModularSciFi{PackName} (pack specific items)
Just a thought.