I’d really like to make Exegol Coruscant. It ties everything together quite nicely. Palpatine’s lair being the Sith Temple beneath the Jedi Temple draws from Lucas’s ideas. I also think “Exegol was Coruscant all along” would be a fun light twist. The only obstacle is what to do with the space battle.
[1313 - Night]
Ships zip past as the camera pans up to the entrance of the surface above. A haunting rumble can be heard, the belly of the planet is raging.
[Coruscant - Day - Industrial complex]
Lightning strikes as mountains rise from the surface, but no, they are not mountains, they are STAR DESTROYERS.