Curnow, who had knee and ankle surgeries in pre-season, missed the Blues' shock round-one loss to Richmond last Thursday.
But on Tuesday night, the Blues officially ticked off the big man's return.
Fremantle are also hopeful boom recruit Shai Bolton (leg) can debut against Sydney after missing their round-one loss to Geelong.
"Shai is going to be up for a test at main training, we're just settling down a fibula so if he gets through training, he will be available for selection," Dockers high-performance boss Phil Merriman said.
Sam Switkowski (adductor) will miss two-to-three weeks with an adductor injury while Michael Walters (knee bone bruising) is up to a month away.
Gold Coast defender Charlie Ballard will miss the rest of the AFL season after rupturing the anterior cruciate ligament in his right knee.
Ballard's knee had buckled after an awkward landing late in the second quarter of their 87-point round-one win over West Coast.
It is a massive blow for the Suns in their pursuit of a maiden finals series.
The 25-year-old tall is an integral part of their defence, having played 23 matches in each of the past two seasons.
Ballard joins Mac Andrew (chest), Sam Flanders (back), Leo Lombard (shoulder) and David Swallow (knee) on the sidelines.
Gold Coast are at least hopeful of welcoming back Andrew and Flanders after their round-two bye.
Brisbane defender Darcy Gardiner is in the frame to play his first game either in the AFL or VFL for Brisbane since round eight last season after recovering from his own ACL tear.
The 29-year-old suffered the injury in round eight last year, joined by Lincoln McCarthy, Keidean Coleman, Darcy Gardiner and Tom Doedee - all sidelined with the injury.
Brisbane could also welcome back forward Charlie Cameron against West Coast on Sunday after he was withdrawn from their round-one clash against Sydney with calf tightness.
But they will be without Kai Lohmann (ankle sprain) and Brandon Starcevich (concussion) for at least one week.
McCarthy, who ruptured his ACL in the same match as Gardiner, will undergo surgery after re-injuring his right knee just days out from round one.
Doedee is expected to return within three to five weeks, though Coleman's timeline remains undetermined.
Swans backman Lewis Melican (adductor) will miss two to three weeks.
St Kilda spearhead Max King (knee) is still two to three weeks away but the Saints hope Mitch Owens (shoulder) and Liam Henry (knee) can prove their fitness to return.
North Melbourne defender Griffin Logue (hamstring) will miss at least Sunday's clash with Melbourne while Charlie Comben (ankle) will have to prove his fitness.
Demons backman Steven May (larynx) will miss again while Caleb Windsor (foot infection) is in doubt, but Daniel Turner should return from illness.
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