I think Davis played for the US in 2012? Barrett would definitely be a good addition to their team. Even without him and Wiggins they still have Murray, SGA, Lyles, Olynyk, Thompson. They are probably the second most athletic team only behind the US. Not sure if Australia is good enough to win a medal. Baynes, Exum, Maker or Ingles are nice players, but none of them really makes a difference at this level. On the other hand guys like Ingles or Broekhoff give them spacing, which is exactly what Simmons needs. With Broekhoff and Simmons they also will be great at defending their opponents bigmen. I think Giannis wont have a much weaker supporting cast and he is quite clearly a better player than Simmons, so if you would consider Australia a medal contender, you have to say the same about Greece. Serbia probably has a better supporting cast than those 2 + Jokic is better than any spanish/french player, so Serbia should be favorite for silver. Bronze should be between Greece (if Giannis plays), France, Spain and Australia (if Simmons plays).