How Seattle, Las Vegas and LeBron fit into the NBA's expansion future

NBA commissioner Adam Silver said the league was taking a fresh look at the idea of expanding after nearly two decades .

The NBA last announced expansion in 2002 , and the Charlotte Bobcats started play in October 2004 .

The central issue is whether bringing in new teams and diluting the shares of collective revenue, namely the media rights, is worth the short- and long-term rewards.

Seattle and Las Vegas have been considered front-runners for some time.

The NBA 's board of governors would have to vote to add two members to its group.

Las Vegas has become the NBA 's unofficial 31st city over the past decade .

Mexico City is the most likely one to jump into the mix, but there are logistical hurdles to overcome.

Chris Hansen , leader of a group whose bid to purchase the Sacramento Kings in 2013 was voted down by the league's board of governors, is not expected to head a bid for an expansion team.

James has been transparent about his desire to join Michael Jordan as team governor and become a true shareholder in the NBA .

There are other groups also exploring the possibility in both Las Vegas and Seattle .