The Brooklyn Eminent Domains, or Emdos for short

Brooklyn Schvartzes

Brooklyn Taxi Dodgers.

Brooklyn Hype

As long as they're not the knicks I'll root for them.

Or the Brooklyn Heroes. Would require a GREAT sandwich concession.

Brooklyn Hustle

Also the Brooklyn Natives

I think if not for Sacramento, a good obvious choice would be the Kings given the county name and the imperialist European owner. But after thinking about it for a while, this is my favorite:

The Brooklyn Ballbusters

It's perfect for the borough of pushy, opinionated loudmouths. Now if that's not family-friendly enough for the NBA, they could always just be the Brooklyn Busters (they bust your chops, too!), or the more generic bust still a decent name - the Brooklyn Ballers (pronounced "Bawluz!"). The other theme I thought worked well was organized crime:

The Brooklyn Gangsters

The Brooklyn Doughboys (pizza reference)

or simply just The Brooklyn Muscle

you made me think of these names:

brooklyn dongers - "omg! the dongers win the championship! the dongers win the championship! i don't believe it!"

brooklyn ghostbusters (that would be awesome!)

brooklyn brown-stoners (holy shit that's racist!!! relax -- it's just a crappy joke.)

ok ok. one more:

the brooklyn mobsters!

I thought everyone knew they are going to be the Brooklyn Knights.

The Flying Hasids.

Brooklyn Hipsters

The Brooklyn Borscht!

The mascot can be a giant beet!

LMAO @jaycjay

Brooklyn Booyahs! with a modern, internet-age exclamation point and all.

It should be changed, because Nets is stupid name. It's like naming a football team the Goal Posts, or a baseball team the Home Plates.

Go vintage: The Breukelen Peach Baskets

Brooklyn Bastids