Considering most of these teams are a step slower or worse due to missing talent, Team USA SHOULD satill dominate all of these games.
Spain would have been the biggest threat, but they lose a lot without Marc being out there. Argentina is too old. Austrailia's best bet is to grind the game out and hope to get USA in a scrappy contest. It would've been nice if they had a guy like Simmons on the team, though.
I will say ...if any USA team is capable of slipping up, it would be this one. The 08 and 12 squads were just too great from a talent standpoint. Of course, this team is heads and shoulders better than everyone else, but they lack the continuity that teams like Spain, Austrailia, France, Argentina, etc. have. I wouldn't be surprised to see 1 or 2 games close to down to the wire with USA pulling it out by 8-10 points.
Teams that can take away USA's main advantage (size in the frontcourt) will pose the biggest threat. Spain kinda lacks that without Marc, but France and Austrailia has it.