A 10 team competition is the NBL's goal for the foreseeable future. The NBL are wresting with the idea of having an AFL affiliate team play in Melbourne and Perth.
A 2nd Melbourne/VIC team will happen within a couple years. Whilst i love AFL, I'm not convinced an AFL aligned team is a good idea. I'd like to support a 2nd Melbourne team, but if it was say, Collingwood, I wouldn't watch it, nor would anyone who wasn't a Collingwood supporter. I like the idea of a Victorian team, thus meaning they represent the state. Play at Margaret Court Arena (State Basketball Centre is too small) plus a couple home games in Bendigo or Geelong.
10th team I think should between Wellington and Perth. The crowds Perth are getting are too good to not at least consider a 2nd team. Considering Perth only has 2 AFL teams, perhaps an AFL affiliate (Fremantle Dockers) could work.
I can't see Hobart getting a team. Issue is they don't have a great basketball arena. If I'm not mistaken, it is the Derwent Entertainment Centre, which would be pretty shit for Basketball. An entire length of the court has no seating.