So, time to start designing the next expansion. The only story thread currently left hanging is the question of where the Space Eels come from. Well, (and this is a spoiler), Space Eels originate in the Gaia sector. My only concern is where I can draw space born organic creatures and have them look half way decent. The Eels themselves look good, but they are pretty small.
I think it's might be best to introduce the Tesla. I'll attach their graphic below. The Tesla sector is populated with energy creatures (which are much easier to draw). I could even revisit the orbiting ring system idea that I rejected on the last expansion.