Is there content for (Harmonic) Skyfall if you beat the Empire? (No spoilers, please.)

Title. I'm playing Harmonic Skyfall, war against the Empire has basically only just started (it's...mid 1013, give or take), but it's going quite well. It's Single Player, so needless to say "going quite well" means "I'm gonna win relatively quickly."

I'm just curious if there's any more content after this. I've finished the entire political tree, so I'm going between the army and air force. ^((I'm about to start researching the various 1015 naval modules. Once I have some good, ahead-of-time designs to build,) ^(then) ^(I'll finally start the Naval Tree. Is that stupid? I mean, maybe, but I'm pretty sure the Empire gets most of its naval strength from yoinking Skyfall's navy, so, whatever. It's SP, you can play sub optimally.))

Basically, it doesn't look like there's anything for me to do once I beat the Empire. Should I expect that, or will I be surprised with something?

Again, please no spoilers. A "yes there's more content" or "no, once you've done that you can basically end the run there" is all I need.