Canberra and Perth are the only places I can see conceivably working as Team 20. The NT is a romantic option, but really a pipedream.
But I think Canberra still makes more sense (I realise I can't say that without bias).
To me, Fremantle is still so far behind West Coast, that they still need time to catch up (hopefully a few years of the current performances can help). Even this year, West Coast have 100k members and Freo have 53k.
Freo should be a huge club alongside West Coast, but I fear a third Perth team will hamstring Freo's growth and result in West Coast overshadowing two mediocre clubs, rather than Perth having two strong clubs.
lol wut? We get 40k every game
Go and have a look at the crowds thread, Collingwood are getting jizzed on because they got 45k yesterday. We'll probably better that next weekend unless the weather is garbage, and that's with the cheapest tickets being $39.
Compare any club to West Coast and they look like minnows.