NBL season is during the Wet. There is nothing else really on during that time except local footy. If games follow standard NBL time slots, with Darwin getting less Saturday night games, they have no competitors for the entertainment market. Indoor sport versus getting drilled by monsoonal rain.
The area already accepts crowds up to 6-8,000 for different events with good traffic flow out post these events.
NBL tourism would be a highlight. As an investment, it would certainly entertain the younger professionals who moved to Darwin but then get stranded on social events during the wet.
Darwin Dragons using a frilled neck would closer our strong Asian region and population with the dragon word, but keep an Australian animal from the ant in the mix.