As I wrote 2 years ago about New Balance's potential expansion, the devil is in the details, and it will be a long time before the details of this plan are worked out. But the big ideas of offices, track and field, hockey, and hotel all sound pretty good. Especially if this spurs infrastructure improvements like a commuter rail stop (and it is hard to imagine a project of this magnitude without it) in the Everett Street / Market Street area it can be really great.
Boston Redevelopment Authority project website
New Balance's Letter of Intent to the BRA