There's no need to overreact, IMO. Basketball is still a 2nd (or 3rd) tier sport in Europe, like Handball, F1 or tennis - and arguably way bellow these. I don't believe an extension to Europe is coming anytime soon. There's not enough public.
How'd you come to this conclusion? By all indications, basketball is the 2nd most popular sport behind soccer in Europe. If you contend this isn't true, can you name what sports are more popular? Cricket? Rugby?
Cricket? hehe. Outside the UK, cricket is as popular as baseball. Those I mentioned previously. Basketball is the 2nd most popular sport in a few countries: Greece, Turkey, Israel, Spain, the Baltic states (especially Lithuania, the only country where it may be as popular as soccer, or at least it's close), some Balcan countries, maybe Russia. But that's all. It's not popular in the UK, not even close to, for example, rugby, it's not popular in Germany (even with the Dirk effect, most German players in the professional German League are not pros, they need to have another job), not as much as handball. It's not as popular as rugby in France. Or as cycling in Belgium and in the Netherlands. It's not nearly as popular as wintersports or athletics in Scandinavia. In Portugal, it's not as popular as roller hockey. Maybe the pro league it's more popular than handball's one. But there are more people practicing competitive handball than basketball. And the transmission of a F1 Grand Prix has like 10 times more audience than the Finals of the basketball league, I think. And, like in many European countries, there are the individual sports. It's way easier to find a Portuguese who knows the name of the best female tennis player (who's not even in the WTA top-100) or the name of some guy who's a good triple-jump athlete than the name of the best basketball player, I can assure you. Even in Spain, Gasol's or Calderon's popularity is not comparable to those of guys like Nadal, Alonso or Contador.
And then, soccer is absolutely hegemonic. NFL is more popular than the NBA in the US, but it's somehow close. Same to baseball or hockey. Not in Europe. Even in Spain, with the biggest domestic league, and the best average attendances by far, there are more people in soccer stadiums during a single weekend than attending ACB basketball games during the all year. That's why I think this issue is creating an unnecessary overreaction.