I know its a little late to be putting ideas out into the inter-web but i just needed to get this idea out
New Building Idea
The new building should be a prison or jail of some kind, i think this would add an extra element of realism to the game so here it goes
The prison would be built just like any other orbital structure and would make a certain type of corvette, the prison collector (that's the only name i could think of at the moment)
So lets say you are in a battle and you kill all the ships in that gravity well and they go boom you would build the prison corvette and send it to the gravity well
It would have the ability called prison call and would only work if there was a destroyed cap ship or titan, (and the prisoners would only stay there for a certain amount of time).
So the ship would go to the piles of obliterated enemy cap ship/ titan and "pick up" the prisoners, but you wouldn't see the prisoners.
Each cap ship and titan would have a certain amount of crew that would turn into prisoners when the ship was destroyed
So after picking up the prisoners the corvette would go back to the prison orbiting your planet and put the prisoners in the prison
Buying Back/ Trading Enemy Prisoners
Depending on the amount of prisoners you have captured there would be an amount the enemy empire would have to pay to get them back, So like 300 credits for every 50 prisoners. There would be a limit to the amount of prisoners you can keep in the prison
If the empire decides not to buy back the prisoners there would be a consequence for not doing so (what that consequence should be, i don't know)
Then there would also be an option to sell the prisoners to another empire, (but you would have to research the option to sell the prisoners)
You could change the amount of prisoners you want to sell to the empire and there would be a price just like it would be if you were trying to buy the prisoners back.
BUT the prisoners you have would generate and revenue due to the fact that they would be working for you so like for every 50 prisoners you would get 1 or 2 credits per second.
All the prison management stuff would be conducted through the Black Market window
Hope you liked my ideas