Who said there had to be only one Melbourne team. If you don't want to support the Melbourne Tigers and support the other teams then support Melbourne United. But what you are saying was the problem with the other Melbourne Teams. There was the Nunawading Spectres which became the Eastside Spectres which merged with the Southern Melbourne Saints which was the Westside Saints and before that the St. Kilda Saints. The side was the South East Melbourne Magic. The Coburg Giants became the North Melbourne Giants. They merged with the Magic to become the Victoria Titans. The Titans became the Giants, and then they where no more. These three Melbourne NBL Clubs changed their names and merged, while the Melbourne Tigers were the Melbourne Tigers.I always supported the "other" Melbourne teams (Magic, Titans and Dragons) and for me supporting Melbourne United is far easier than supporting the Tigers.
Hopefully the Melbourne Tigers will return to the NBL and we will see a true Melbourne rivalry between the Melbourne Tigers and Melbourne United.