1. Team North America
2. Team Europe
3. Team Oceania
4. Team South America
Those two match-ups could be quite interesting. I think South America would top Oceania more often than not. See Vart's list for a quick start to a roster.
Would a North American roster change much from the US Olympic team at its peak, given that Nash has aged? Any other brilliant Canadian or Mexican players I'm forgetting? There are a number of Canadians, but none really close to the top 10-15.
Meanwhile, Europe could assemble quite a team. If European countries can often challenge the US, could a European All-Star team beat them more than they lost?
Just picking some of the better options from Wikipedia: Batum, Beaubois, de Colo, Diaw, Gelabale, Noah, Parker, Petro, Pietrus, Kaman, Dirk, Deng (UK), Gordon, Bargnani, Belinelli, Gallinari, Kleiza, Valaciunas, Vucevic, Pekovic, Kirilenko, Shved, Dragic, Udrih, Calderon, Claver, Gasol, Gasol, Ibaka, Rubio, Jerebko, Sefolosha, Asik, Ilyasova, Turkoglu.
Is Turkey classified as within Europe for FIBA purposes? I know Istanbul is considered to straddle the border between Europe and Asia, which would imply that the majority of Turkey is in Asia.
Just mucking around:
Parker/Rubio/Dragic
Belinelli/Gordon/Kleiza
Gallinari/Deng/Kirilenko
Nowitzki/P Gasol/Ibaka
M Gasol/Noah/Asik/Pekovic
Scrawny at SG, but loaded in the frontcourt. Gasol and Noah are considered two of the best centres, Pekovic more than capable, Dirk and P Gasol are excellent PFs. Gallinari underrated. Parker is one of the best, and Rubio is pretty exciting. Lots of back-up options at PG too in Udrih, Calderon, Shved, etc.