I've noticed you don't expect much from the upcoming season. You all are discussing players, coaches and other conditions. I'm going to be Mr Obvious and maybe little off topic now but state my thoughts anyway.
It's not only up to the players but it's also up to the fans, I saw a tendency that during NBA games fans react heavily mainly to dunks and blocks , they seem to try maintaining their dignity. Of course, NBA system has significant number of games and its hard to cheer like crazy in all of those games( unless it's playoffs), but this cheering make players ten times more motivated. If they are well supported at home they will be even more competitive playing in States when they will know that they have amazing fans waiting for a win back at home. Especially young players, that's a big burst of motivation and self confidence for them.
JV is not an exception, I still think he was so solid during EuroBasket and EuroLeague because of his willingness to win the games for the fans, not for his own needs. Of course, Canada is not an basketball nation it's nearly a mission impossible(correct me if I'm wrong) to bring all people in home arena chanting together, but with the arena like that the effect would be massive.
Even the Bargnani was trying to defend when he played for his national team at EuroBasket, he seemed to play the defensive part of the game, not to be lazy and the most importantly play for someone else, not himself (Italy fans?). Don't criticize too much and sorry for mistakes, English is not my native language.