I grew up in Brooklyn, having lived there for the majority of my life, but unfortunately we didn't have a team for any part of it. Based on how older folk still talk about the Dodgers, I too have hope that the Nets will develop a rabid fanbase. But it will take some time.
I got to admit, I don't understand this sentiment at all, so maybe someone can explain it to me.
The Brooklyn doesn't have a team sentiment. Why aren't Brooklynites Knicks fans? MSG and the new Brooklyn arena are only half an hour away from each other, it's not like it's trouble getting from Brooklyn to the Garden, especially with all the super easy access to public transportation in New York. So I don't get this Brooklyn doesn't have a team attitude, why aren't the Knicks your team already? (Also why are they still clinging to the Dodgers and not Yankees or Mets fans by now?).
Maybe it's because I grew up in Hartford, where many of us would gladly make the 2 hour trips to New York or Boston to cheer on the Celtics, Knicks, Yankees, Mets, Patriots, Giants, etc.
And I also lived in Dallas, where it could take about 40 minutes to an hour depending on traffic to get to Cowboy Stadium or to a Rangers games.
So distance-wise, travel-time wise, I just don't get this Brooklyn doesn't have a team sentiment.
Market-wise I get how big cities like New York can support multiple teams, I just don't get why everybody's not already a Knick fan (terribly run organization aside). (I especially don't get it in LA with Lakers/Clippers, though I kind of get the cheap Clippers tickets vs the expensive Lakers tickets, but that's a whole different discussion).