The AFL have confirmed a twilight preliminary final at the Gabba for Brisbane's massive Saturday of preliminary finals football.
The Lions will host Carlton from 5.15pm ahead of the NRL preliminary final between the Broncos and NZ Warriors from 7.50pm at Suncorp Stadium.
As expected, Collingwood will host GWS on Friday night at the MCG.
It means a six-day turnaround for the Giants, but the intensely pro-Magpies crowd will not bother them after their succession of away wins this season.
The winners will play in the grand final on Saturday week.
GWS narrowly beat Collingwood in an MCG preliminary final four years to reach their only grand final, where they were mauled by Richmond.
The Gabba final marks Carlton's Michael Voss going up against his old club, where he was a three-time premiership captain before becoming the Lions' coach.
Friday, September 22
Collingwood v GWS at the MCG, 7.50pm
Saturday, September 23
Brisbane v Carlton at the Gabba, 5.15pm