I haven't seen it discussed around here but I think one of the main reasons for the Second Melbourne Team folding was the unsuitability of available venues and in regards to the South Dragons the Tigers doing whatever they could to shut them out of playing any games at SNAHC.
With Margaret Court in use as of next season, surely it would be a viable option for a second Melbourne team to compete in the NBL again. If you look at the Dragons, at the time they had triple the membership base of the Tigers and crowds were significantly higher and were higher compared to the Tigers average at Hisense.
The main problem IMO has been finding a way to make the 5,000-7,000 hardcore supporters into a viable sporting franchise. With a decent deal at Margaret Court at the use of the State Basketball Centre during the Aus Open (or an incredibly favourable deal at Hisense) I think we have the makings of a viable second melbourne team finally! *Hoping for the South Dragons to return*