Come on people, at least try to be a little bit forward-looking. It's certainly possible. Not in 10 years but maybe but in 20 years or so, why not.
Talent wise, if it's gonna be a small expansion like a 5 team division for Europe, it won't degrade the overall talent. There are already teams in Europe that could compete for a playoff spot with a few tweaks.
Travel wise, in twenty years there maybe much faster jets in common usage. Even if they are not that common, NBA can rent or buy for the travels a few of them super fast jets. Even today the flights are almost down to 5-6(7 average) hours for a New York to London travel. (Btw, I'm not even mentioning teleportation)
Business wise, believe or not but Basketball is growing in Europe faster than ever. It's still far behind futbol but it will stay that way only if we don't do anything. Even the talk of an NBA expansion is good for Basketball business and propagation in Europe. Just a few years ago British people had no idea what a Basketball ball looks like but they now have semi decent NT teams both men and women. Even further, if it wasn't for the Chinese and far east interest of the NBA, we could be talking a lot more serious on the Europe expansion. The money on the far east was the main intervention for this possible Europe expansion to become more realistic by now.
Implementation wise, it's not gonna happen over a night, people. There are a lot of pre-projects. Like having super cup games between NBA champs and EuroLeague champs. Special tournaments, prep games(which is happening for a few years now), Euro teams visiting NBA teams, other interesting concepts and all...
I say it's not only possible but it is probable and it will be very interesting for the development of the game of Basketball.