Calderwood, newly arrived at Wigan from Leeds, has been brought in as cover for Carney, who strained his vulnerable left hamstring when scoring a brilliant second try against New Zealand on Saturday.
"His game has improved immensely over the last two years," Brian Noble, the Great Britain coach, said of Calderwood. "This doesn't necessarily mean he's going to play, but we have another option now."
Calderwood, Super League's leading try-scorer last season, said that he would be ready if called upon to make his debut at Hull.
"I've been watching every game at home and wanting to be out there," he said. "I might get my opportunity now and, if I get picked, I'll wear the shirt with great pride. I've been in the England team and put in some good performances with them. I've already started training at Wigan as well, so I'm prepared."
Carney believes, however, that his successor at Wigan might have to wait longer before displacing him in the national team.
"I'm hopeful I'll be fit," he said. "I had a good run this morning on the treadmill and then back on the field and it felt good. I hope it will be similar to last year, when I had to come off during the match against Australia but I was right as rain the following week."
Noble will give Carney and Paul Wellens, who took a bang to the knee, until tomorrow before he considers ruling them out, but he already knows that he will be without Paul Deacon.
The Bradford scrum-half has had successful surgery on fractures of his palate and cheekbone inflicted in a high tackle by the Kiwis' Nigel Vagana on Saturday and will not play again until next season. Vagana will face a disciplinary hearing today to determine whether he should be suspended for the tackle.
Australia name their team today for the game which will decide which two sides contest the Tri-Nations final at Elland Road on 26 November.
In the absence of the injured Darren Lockyer, the area of conjecture is at half-back. Scott Prince and Craig Gower were the combination in Saturday's 44-12 victory over France, but Trent Barrett could come into the equation. He has been wearing a specially made insole to try to cure a foot problem and is said to have made good progress.
The executive chairman of the Rugby League, Richard Lewis, says he is confident of the Tri-Nations being held in the southern hemisphere next season as planned, despite Australia expressing doubts about its viability. The matter will be discussed at next week's meeting of the game's International Federation, but Lewis said: "I'm not anticipating any problems."Reuse content