I think the starting XV for RWC time is more or less settled in EJ (Eddie Jones)'s head. I don't necessarily think it should be, but I anticipate a team (presuming fitness) of roughly the following
Kellaway, Nawaqanitawase, Ikitau, Kerevi, Koroibete, Cooper, White, Slipper, Porecki, AAA, Arnold, Skelton...