Hello Shadowhal,
thanks for the reply!

I think you are getting this wrong. sins will not feature billions of planets. in fact you can mod it for as much as you like, but you will not find any computer on this planet that will be able to do it. maybe with all computers' calculating power put together it might work, but I doubt it.
Yes there is the computing power issue too, I failed to mention it.
besides that as you correctly point out you wouldnt be able to manage it. just to give you a scope of this game. medium gaves have about 30 planets in a single star system, the largest maps now have 6 star systems and about 60 planets. that's actually fun and can be played without getting crazy or it being an organisational nightmare. I heard ppl who tried a few hundred planets across a few dozen star systems. probably gameplay will be broken at this point, but it has been done and it can be done, but this is usually the point where computer power becomes a limiting item.
Uhm it's quite different from what I imagined. Now I don't remember where (trailer or review) but I understood that you enter in a star system with your fleet, you conquer all the planets annihilating all resistance, and then you make them producing what you need and then you move to another star system. Somewhere I read that the games makes jumps through different galaxies even ten minutes long.
So I imagined something muhc bigger than you mentioned. Well I bet it will be a nice and complex game anyway!
hope this answered some of your points. and remember that in sins every planet is essentially a (very) small rts map of its own. like the empire of war battle maps, but without transition and interconnected.
Is it like Imperium Galactica 2 without the planet surface, right?