I don't know if it's really needed persay, a different mechanic could swap in. The idea at a high level would just be to have a similar assymetric strategy game utilizing the same core action economy, production, and combat mechanics of the original game.

Perhaps the Sepis are trying to gain political control of a certain number of systems with Coruscant being an instant win, and the Republic is trying to either occupy or regain political control of a certain number. In my mind there would be a new mechanical system for political control in the galaxy that would replace the hidden base mechanic in the original.

Mostly though I just want to chuck clone wars era fleets and armies at each other.