Roxas will be going to find Eli and bring her back to Auradon.

Prompto will probably go to try and help.

Zuko will be using any means necessary to get off of the Isle.

Jack doesn't have much feeling one way or the other and could probably be convinced either way. Though, if he had any idea he'd likely be rendered invisible again in Auradon he'd want to stay on the Isle. Of course, he doesn't know that though.