I think there was even a Baseball team or something once
All failed really.
Raiders are still around though right? NRA or something isn't it?
But seriously the Goverment down there is to build a new Stadium, or are at least talking about one in the CBD up to 40K spectators....but soccer and Rugby only!!
I think there are only two failed on that list, and they're in leagues that contracted or no longer exist. I think the Comets are still going. The Canberra Cavalry (baseball) is definitely still going well.
The Raiders are doing well in the NRL (the NRA wouldn't be popular here). There's still more Aussie Rules players than league players here though. Rugby union is pretty popular with the Brumbies in the Super Rugby (but the Giants still have higher crowds). The stadium will likely be 25k-30k. There was early plans for it to include an oval configuration, but it looks like it'll be too tighter squeeze in the preferred location.