I'll have a go at it for you ORF, while Rowsus has a kip on the other side of the world.
Backs: Dunn, Frawley, Terlich
H/Backs; Grimes, McDonald, Clisby
Centres: Watts, Tyson, M. Jones
H/Forwards: Vince, Dawes, Trengove
Forwards: Howe, Hogan, JKH
Rucks: Spencer, N Jones, Cross
I/C: Michie, Fitzpatrick, Georgiou
Sub: Toumpas
Emergencies: Byrnes, Pederson, Nicholson or Kent
The above assumes Garland, Jamar, Gawn, Viney and Mitch Clark won't be right for round 1 and Georgiou is elevated from the rookie list, which I'm sure he will be.
Re the sub, I'm guessing Roos will go with the more mature body of Matt Jones over Toumpas, who could be eased into the season.
Just a red flag on Georgiou, he may miss when Garland is ready to return. As was mentioned in another thread, he is competing with Clisby for a spot. Georgiou is 188cm and 88kgs, Clisby is 182cm and 83kgs, so it may well come down to match ups on the day.
Hope this helps and will be interested to see Rowsus' version.