I still reckon it could be suited to basketball if the flat floor is big enough. Perth Ent Cent was a similar shape and it managed to host the Wildcats.
Brisbane has a big enough floorspace to host the Bullets.
The Bayside Auditorium of the Sydney Convention Centre, weightlifting venue for the Olympics, is below. This is the main Convention venue in Sydney at the northern end of the Exhibition Halls, right on the water at Darling Harbour. The SydEntCent is at the southern end. I've been here and from memory there was not enough flat floor space at the front for a basketball court, but the photos at the link below show it hosting Dancesport! Still, at a 3500 capacity it is too small for NBL basketball.http://www.scec.com.au/rooms/fact_sheet ... jectID=149
The Kings would do well to keep playing in the city. Their crowds don't justify the need to go somewhere holding more than 6000 unless they make finals. If they are going to be the only team in town, I do like Acer Arena for bigger games.
No doubt concerts will move. 6000 isn't much more than 4500 at the Hordern Pavilion. If Acer Arena is the only indoor venue that holds five-figure crowds, a lot of bigger acts will go there because they can play fewer shows to make a profit.