One of the sites being considered is part of the parcel the city seized to build the new convention center in South Boston. Because the center scaled down its plans due to budget overruns, 18 of the 60 acres there are not needed. It is unclear whether legislators would want to save those extra acres for expansion of the center down the road.

Another site is along the Reserve Channel, which ironically is the site on which Robert Kraft proposed to build a football stadium four years ago. Kraft was nearly run out of town when he pitched his idea. The Massachusetts Port Authority owns the site.

The last site is along the Fort Point Channel area and is, perhaps most ironically, a parcel once considered by the current Red Sox as a site for the team. Once Kraft's football stadium idea was so soundly rejected, Mayor Thomas M. Menino pushed the team to build in the Fenway near the old ballpark. Gillette has since purchased 11 acres where the team wanted to build so it is unclear how a deal would be structured.