I totaly confused DR and PR as well and I remember Horford playing. Davis is a different situation. He went as a 12th man to learn, he didn't play much, it was just great experience for him to be with all those other guys. And Olympics is something else, level up on WC, at least how NBA people regard it. I think and it was the case in the last Olympics that much stronger team went to the Olympics in USA than in WC, but this year WC is one year away from the Olympics, so it might change a little. For Barrett he would be one of more important players in Canada, so I don't know. My bet is he doesn't play but we'll see.
Well, yeah Greeks are contenders for sure. I hate to give up on Spain but I think they are behind Serbia, France and Greece atm. For Giannis and Simmons lack of shooting will be a problem cause in intl game it's a bigger issue than in NBA because of defense rules being different. Teams will clog the paint and let other beat them. But still, MVP of the season probably and the leap he's made, I mean, I wouldn't want to play against them.
And we'll see about Jokić. I really hope he plays, but it's far from certain. He's a strange guy to be honest but someone who should carry the team in the next decade. However when guy behaves like insulted child I don't know.