I always thought about a possible power struggle after the Reaper War. The different races grabbing for power with the council trying to avoid conflict. I thought the description of the game would read something like this.
"It's been 150 years since the Reaper wars and the Galaxy sits on the edge of conflict. The various races have each colonized all of known space, yet there are 100's if not 1000's of relays that are just being activated. With a unanimous decision by the council some of these relays are being activated out of both curiosity and need. Some species are rapidly growing in population and need new planets for colonization. Who knows what the future holds?"
Choose from either the Krogan, Asari, Humans, Turians, Salarians, or Quarians.
Interact with the Hanar, Volus, Elcor, and other client races.
Uplift species that previously have been less advanced such as the Yahg, Raloi, and Vorcha.
Opening up new Mass Relays opens up new oppurtunities, but be careful you might unleash a full blown war with a new species right behind your borders.
The game would be turned based for troop movements but real time for combat ( like the Total War campaign screen ) and included space and land based combat as well as the ability to annihalate whole systems.
Just and idea I had, what do you think?