Hey guys,
Just thought i would include a couple of idea
1. black holes
I think these would be good but would be hard to get right, i was thinking that a warning could pop up when a block hole was going to happen, you could maybe build somthing on that planet that means it won't get sucked in, and when you don't have it, on each turn your planet or another persons planet gets closer to the black hole, once it has gone you get a pop up saying how many people have died some people could get in escape pods and head to a friendly planet, or could get stolen by the enemy.
When it happens to an enemy and allied could tell you that his sources say planet X owned by enemy Y has been destroyed, this information could be correct or incorrect, you do espionage to find out if it is right or not.
2. UP
You should be able to have differn't leaders including yourself, you could choose the topics for each month, and maybe decide the voting system. I think that you could maybe vote people out of the united planets for reason Y, then they have to apply to get in and you can vote on that aswell.
MaYbe if your in charge and your at war with someone you can disable there voting privelages for like 2 months for reason X tihs could also happen to you.
These are the only two i can think of for now.