The fixture has been finalised:
Round 23 fixture. All times local
Friday, September 4
Richmond v North Melbourne at Etihad Stadium, 7.50pm AEST (Channel 7)
Saturday, September 5
Geelong v Adelaide at Simonds Stadium, 1.05pm AEST (Fox Sports)
Brisbane Lions v Western Bulldogs at the Gabba, 1.45pm AEST (Channel 7)
Port Adelaide v
Fremantle at Adelaide Oval, 3.20pm ACST (
Fox Sports)
Hawthorn v Carlton at the MCG, 4.40pm AEST (Fox Sports)
West Coast v St Kilda at Domain Stadium, 5.40pm AWST (Channel 7)
Sydney Swans v Gold Coast at the SCG, 7.20pm AEST (Fox Sports)
Sunday, September 6
Melbourne v GWS at Etihad Stadium, 1.10pm AEST (Fox Sports)
Collingwood v Essendon at the MCG, 3.20pm AEST (Channel 7)
www.afl.com.au/news/2015-08-05/round-23-fixture-revealed
Edit: I'm not up on the workings of the broadcast licences, which is why i ask the question.