They still can skip it.Qualification for Tokyo comes from Mundobasket 2019.The Top-3 teams from America's,the Top-4 from Europe etc.
Eurobasket could be decent,but Imo I didn't like the fact that from now on the tournament will be held every 4 years,after 2017.Plus as it's already been mentioned,no motivation for the superstars to come and play.This truly sucks,considering that the NBA catches every young prospect.It could be like another Euroleague just with national teams participating.After some years I believe(not hope) that it could have the prestige of lower continental championships.It might not be seemed 2017 and 2021,but honestly overhyped rookies won't/don't give a shit about FIBA.Come and playing once or twice in 3 years would reduce the level of international basketball.No competition anymore,just the luckiest one who will produce consistently players will dominate in the region.Boring as hell.