Before anyone points it out, yes, this is heavily inspired by Mass Effect, but then again, much of this game is, as well as other Sci-Fi properties.
The Galactic Community in Stellaris to me already shares much of the elements of the Citadel species from Mass Effect. Each species with the exception of murderous Gestalts are given the option to join the community and contribute to the mutual survival and growth of life in the galaxy, through trade, defence and so forth. In both Mass Effect and Stellaris, the Galactic Community/Citadel species are ruled by a single representative from each of the three most powerful/influential species in the community. In Mass Effect, the Citadel is the hub of Galactic activity, both in politics and culture.
I believe that the Galactic Community in Stellaris should be able to build a megastructure called the Citadel, which would act as the political and cultural center of the Galactic Community. I'm aware that the Interstellar Assembly and Mega Art Installation exist, so I think that this Citadel should be boosted in some ways by the effects of certain other megastructures of each species within the community. For example, the Citadel might be affected by the collective bonuses of all Strategic Coordination Centers in the Community, it may receive +50K Fleet power for each species in the community, so it is not taken easily. There's a lot of tweaking and and suggesting that can be done with this and as a murderous robot empire completely by chance named the Reapers using a species model that completely by chance looks more like the Geth than any other species model in the game I would very much like to try and take one of these things out on Grand Admiral with maximum advanced empires with Advanced starts.
The Galactic Community in Stellaris to me already shares much of the elements of the Citadel species from Mass Effect. Each species with the exception of murderous Gestalts are given the option to join the community and contribute to the mutual survival and growth of life in the galaxy, through trade, defence and so forth. In both Mass Effect and Stellaris, the Galactic Community/Citadel species are ruled by a single representative from each of the three most powerful/influential species in the community. In Mass Effect, the Citadel is the hub of Galactic activity, both in politics and culture.
I believe that the Galactic Community in Stellaris should be able to build a megastructure called the Citadel, which would act as the political and cultural center of the Galactic Community. I'm aware that the Interstellar Assembly and Mega Art Installation exist, so I think that this Citadel should be boosted in some ways by the effects of certain other megastructures of each species within the community. For example, the Citadel might be affected by the collective bonuses of all Strategic Coordination Centers in the Community, it may receive +50K Fleet power for each species in the community, so it is not taken easily. There's a lot of tweaking and and suggesting that can be done with this and as a murderous robot empire completely by chance named the Reapers using a species model that completely by chance looks more like the Geth than any other species model in the game I would very much like to try and take one of these things out on Grand Admiral with maximum advanced empires with Advanced starts.