It looks great. All square, black, shiny with a moving LED halo. :-)
Inside it is what matters. That’s the most important part of an indoor arena.
As a rule concert goers aren’t bothered about how an indoor arena looks externally, they are more bothered about the sound, the views, and the facilities inside the arena. That’s where most of the money is being spent. I have no doubt once the arena is open it will be one of the best indoor arenas in the world, part owned by the CFG, and next to the expanded Etihad stadium. :-)