Brisbane have won five consecutive matches since a 28-20 loss to Gold Coast in round eight, and will meet Sydney Roosters for the NRLW title.
The undefeated minor premiers beat Brisbane 34-20 in round seven of 2026, but the Broncos have the stronger grand-final record between the clubs.
This will be their fourth decider in nine seasons.
Brisbane won 34-12 in the inaugural final and 20-10 in 2020; the Roosters beat them 22-16 in a 2021 semi-final before winning their first title.
The Broncos prevailed 22-18 over the Tricolours in last year's grand final.
Days after Sunday's Sydney decider, Broncos Tamika Upton, Julia Robinson and Romy Teitzel are set to join Roosters Jess Sergis, Olivia Kernick and Isabelle Kelly in the Australian Jillaroos.
After Brisbane's 20-8 preliminary-final win over Gold Coast, Upton said, "They are obviously a quality outfit and any competitor likes to play those big games,"
Coach Scott Prince said the team had learned from its loss to the Roosters.
"We will and we have ... but if I tell you they will find out," Prince grinned.
He called the Roosters a strong team with an aggressive pack and powerful outside backs, adding, "Any half chances they crucify you."