A 33-man training squad implies a match day 23 with a 5/3 bench and 10 extras: third hooker, two extra props (for six in total), fourth lock, two extra loosies (one of them a specialist 7), third halfback, third 5/8, fourth midfielder & fifth outside back.
If they were picking the team right now I think it would look like this:
Props: Crockett, Faumuina, Goodes, Franks, Moody, Tu’ungafasi
Hookers: Coles, Taylor, Coltman or Parsons
Locks: Retallick, Whitelock, two of Barrett, Fifita, Tuipulotu
Loose forwards: Cane, Dixon, Kaino, Read, Savea, Squire, Todd
Halfbacks: Kerr-Barlow, Perenara, Smith
5/8's: Cruden, Barrett, Sopoaga
Midfield: Crotty, Lienert-Brown, two of Fekitoa, Moala, Tamanivalu, Williams
Outside backs: Dagg, Naholo, Milner-Skudder, Savea, Smith
I think the third hooker will be Parsons if he's fit, they seem to prefer him to Coltman.
Third lock will be Tuipulotu if his head is in the right place with Barrett & Fifita a 50/50 call for the fourth.
Williams will be picked if he's 100%, they like the athleticism he brings, the other midfielder will be whoever has the best Super Rugby form.
EDIT: just read that Goodes took another head knock in the Blues trial, causing him to miss the Crusaders trial & be in doubt for Rd 1. Plenty of time for him to recover but he's had a few head knocks now so it could rule him out for a while. Not sure who the next loosehead in the pecking order is.