Marum said Wera will start in the centres with Willie Minoga moved to second rower. Moses Meninga will start at lock.
He added David Loko and Stanton Albert have been omitted from the side for the final round of the season before the finals.
Brandy Peter, Sailas Gahuna and young Muka Peter Kulu have been added to the extended 20-man squad.
The 20-man squad is: 1. Stargroth AMEAN 2. Bland ABAVU 3. Israel ELIAB 4. Adex WERA 5. Butler MORRIS 6. Ase BOAS © 7. Watson BOAS 8. Wellington ALBERT 9. Wartovo PUARA JNR 10. Esau SIUNE 11. Willie MINOGA 12. Nixon PUT 13. Moses MENINGA 14. Paul WAWA 15. Rhadley BRAWA 16. Brandy PETER 17. Enock MAKI 18. Karo KAUNA JNR 19. Sailas GAHUNA 20. Muka Peter KULU
The final 18-man side will be confirmed on Friday. The team leaves for Brisbane on Saturday.
Sunday’s match will kick off at 2:05pm.