Hobart - 3500 if they play out of the derwent entertainment centre, which can hold around 7000 I think. That wouldn't be bad. They're first year might get larger crowds due to renewed interest, but they will need to put a competitive team on the floor to maintain it. Lack of corporate sponsors, and not much interest from wealthy businessmen to buy into a Hobart team means it probably won't happen anyway.
Newcastle 1500-2000. Soccer and rugby league is huge there. Last time there was the Hunter Pirates and that failed with crowds of around 1800 a game. Probably won't happen anyway.
Brisbane - 3000 if they play at the convention centre ( which has a capacity of 4000).
2nd Melbourne - 3000 if they play at Knox(?) and 5000 if try spend money and play at hisence arena.
2nd Sydney - 2500-3000 and will likely play at the sports centre. Crowds will drop off once the interest fades and I can't see it happening anyway.
2nd NZ - likely to be Wellington. They have a nice arena there and if they play there they could get very big crowds initially. 6000?
2nd Perth - will NEVER happen, but if it does they will play out of challenge stadium and will probably attract 3000 a game if they're lucky. And they will be basketball fans who hate the wildcats, and I don't think there would be many that feel that way.