Holmes can start the June internationals, if Weeks is fit and in form he can bench 2 of them, with Kepu getting one game to make sure he's up to date with the squad.
Kepu and Holmes (Starter vs Bench doesn't matter) play throughout the Rugby Championship.
Weeks and Talakai, along with Kepu during the formal window, play during the Autumn internationals.
Weeks and Talakai are just examples. Could be anybody. But Weeks is the first one that came to mind having been capped and regularly starting for a Super Side, and Talakai is the high potential prop to be capped during the EOYT tour, but lack of starts would stop him doing so earlier.
Could easily be Taavao, or Ruan Smith, or whomever the Force tighthead is atm.