Thank you Stardock, for the great game! So far I'm good ways through my first game on an immense map. The Krynn have attacked me without provocation! Fortunately, my ships outclass theirs.
I wanted to suggest an idea perhaps for future expansions, if this hasn't been considered already. How about apocalyptic mega-events that happen at latter stages in the game, just to make things interesting? I supposed I'm somewhat inspired by the Civ 4 mod, Fall From the Heaven II scenario. Here are some ideas:
A "Return of the Dreadlords" scenario or some other powerful malevolent alien race that arrives through an artificial wormhole. The only way to stop this menace would be to unite all the alien races and somehow close the wormhole. Perhaps some clues or harbingers of doom of what's to come can be included too.
An "invasion of the bodysnatchers" scenario. Some parasitic alien species takes control of several colonies and fleets from each race and rapidly expands throughout the galaxy (perhaps the Xor might be immune to this). Again, facing this menace would require unity from all races. It need not be a parasitic alien doing this. It could also be a cybernetic/robotic takeover (e.g. the Borg or the Cylons) or some doomsday "New Order" cult that captures the hearts and minds of a significant amount of the alien population.
Any thoughts?