"But it will be a very strong, competitive Australia side that takes the field."
Josh Morris has been ruled out of Canterbury's encounter with Wests Tigers tonight due to an ankle injury, while fellow centre Hodges is yet to be cleared of the hamstring problem that's affected him all season.
Gallen is battling a badly bruised hip that kept him out of Cronulla's win over South Sydney on Monday and is not a definite starter for the Sharks' clash with Penrith on Sunday.
Slater was initially sidelined for a month with a shoulder issue but is in line to make an earlier than expected return for Melbourne's Anzac Day encounter with Manly.
Should the star fullback get through the game it would allow Sheens to play Greg Inglis in the centres with Michael Jennings or Dylan Walker favourites to partner him should Hodges and Morris be ruled out.
"A fit Billy Slater will always be considered," Sheens said.
""There is no doubt if he plays this weekend he'll be back on the radar. That is no secret.
"I'll have to speak to Josh [Morris] and find out how he is travelling. We have got more than a week before the game is played so we have a little bit of time.
"If he and Hodgo aren't available we have some good depth. [Michael] Jennings and [Dylan] Walker played in the Four Nations and did well."
Sheens also hinted that Andrew Fifita could be in line for a return to the test side, having missed the entire 2014 representative season due to injury and loss of form.
"To be missing two games due to suspension is not the best thing, but Fifita's form had been excellent," he said.
- AAP