The pace bowler has taken 309 Test scalps in 71 five-day games with an average of 22.10.
The Australian chief selector the selector has declared that skipper Cummins will play a "major part" in the upcoming England-Australia contest.
Speculation had been growing that the 32-year-old might miss the series due to a ongoing back issue that had not yet healed.
Earlier indications from team management suggested no final decision had been made regarding his involvement, with the Test matches set to start on 21 November in Perth.
Bailey expressed that the captain is progressing and remained hopeful about the prospects of participating.
"We're aware that the clock is ticking and multiple considerations involved, aside from the back issue, but additional elements," he commented.
"We're encouraged. We firmly believe that he will feature a major part. Ideally from the opening match. If not, we'll reassess."
Previous Setbacks
He was sidelined Australia's limited-overs series against New Zealand and India in the previous weeks after examinations confirmed a stress reaction in his back.
There is a track record of back injuries, with setbacks in multiple past seasons leading to absences from three Australian summers in a limited period.
Cummins stated he would be bold in recovery efforts in his rehabilitation process to make the squad for the contest.
Bailey noted that there was no confirmation if Cummins had begun bowling as part of his recovery but acknowledged it was "becoming urgent" for him to be fit for the initial match.
Contingency Plans
In case of absence, former captain Steve Smith will lead the side.
The talented all-rounder was recently pulled out from the ODI lineup for their limited-overs matches against India as a preventive step because of an abdominal issue.
The selector characterized it as a "slight concern and confirmed that he's scheduled to appear in the state-level matches, so will be "well-prepared to resume bowling."
"We put so much time has gone into developing the strategy for him to participate for the opening match as an all-rounder," he elaborated.
"Originally, he'd only feature in the initial matches in any case. His aggressive style the willow in shorter formats, should it hinder progress for a short period, the choice was made to take a cautious route."
Series Schedule
The Historic Rivalry
Spanning from late 2025 to early 2026
