NBA Executive Vice President of Basketball Strategy & Analytics Evan Wasch on "The Crossover" podcast:
The biggest concern is the basketball one you highlight, that whether it’s blacktop and injury concerns or a wooden court outside with humidity concerns and moisture that can get on the court, being beholden to rain, all of those of things become a consideration.
We’ve explored it, and we’ll continue to talk about it. Obviously, the "Field of Dreams" game was incredibly successful. So, no surprise it has sparked some discussions, and it’s worth exploring. But the logistical challenges of a basketball game outside are just significantly more than a baseball game, which, of course, is already outside.
I don't think an outdoor game will happen anytime soon, but a game in an iconic court or something like that is possible. I think some cool places are the Hinkle Fieldhouse, the "Hoosier Gym" and St. Cecilia's gym (Detroit). If the NBA is willing to spend a ton of money, they could create some kind of structure in the middle of a cornfield or somewhere else.