Galactic Council

New unique old Endless planet, just like Academy. In late-game players receive a quest to (for example) gain sum Pacifists support together in amount of X% (so in whole galaxy). If it failed, nothing happens. If succeed, the new unique planet is a Galactic Council, which is bassicly international goverment and works very similar. Galactic Counsil is 5th unique type of goverment, and it can't be changed. Senators/concils are the sum of senators in all player's goverments. There are also 6 "parties", but they have no leaders at the beginning. You can use one of your heroes to become a council, and he has a chance to be a leader of the party he represent by its views, if he has higher level then another one.

Each 20*x+10 turns (in the middle of term of office of Empire Goverments) (on normal speed) the council change the pool of senators and nobody has infuence to change it, BUT there is voting phase for special GLOBAL laws. This is unique pool of laws, for example:

 - (Militarists) Increase defensive potencial of ALL systems by X% per planet in it.

 - (Scientists) Each technology is X% cheaper to research by each player who's researched it.

 - (Ecologists) X strategy/luxury becomes illegal. No Empire can gain it or use it.

 - (Religious) Decreases science income of all players by 20%.

 - (Industralists) Special system projects generate 50% more FIDSI then usual.

 - (Pacifists) All Empires share their vision for everyone.

Of cource more (for example) Pacifists means more and stronger types of laws to choose from.

Not everybody can offer law they want. They can be proposedonly by:

 - Empire that owns system of Galacic Council.

 - Empire that have the most points of all.

 - (Only on first meeting) Empire that's 1st in unlocking the Council quest.

 - (2nd and later meetings) Empire that owns the best Council Hero.

 - (2nd and later meetings) Empire whos Council Hero owns the strongest council party.

Each Empire can propose up to one laws, so each meeting has 1-4 votings and 4 is the maximum amount of international laws active in one time.

After proposals, each player vote if the law will be rejected or not. I'm not sure how it could work: left as purediplomatic when one Empire == more vote, or do something that would increase the voting power of an Empire. It would be also added new option to diplomacy/trade where we can offer our vote to another player in next Galactic Council Meeting in exchange of something else.

This feature is kind of rather major one, that would be implemented rather then expanion, but it also can create more interaction between ALL players, not just the bunch of them.