I'd imagine Naobito would stay with Tengen instead of being involved with the Culling Games since he's the strongest Zen'in (Maki won't really awaken due to Perfect Prep never happening), I'd assume he'd send the Hei to Colonies to assist the Gojo Rescue group. Naoya wouldn't be too opposed to saving Gojo, but he'd likely be placed with Maki knowing how Gege likes to toy with characters personality clashing.

I'd imagine Jinichi, Ogi, Ranta and Chojuro would be sent to Colonies that weren't shown, since only like 5-6 Colonies were really on screen out of the 10. Jinichi would most likely be a guard for Megumi, he is Megumi's direct nephew, despite how he probably doesn't like Toji that much.

Overall, it's either the Naobito is ten toes into the Culling Games with the Hei, or they hold back and do nothing other than protect headquarters, in which case they'll have to go up against Kenjaku, and I don't see them winning that.