...discusses the feasibility of building a "megaplex" facility which would combine exhibition and sports stadium components into one development and a stadium only facility, either in Boston or in another area of the state; gives data on current exhibit space at convention facilities (Bayside Expo Center, World Trade Center and Hynes Convention Center) compared to space in other cities, airline service to Boston, convention and sports event attendance in Boston and other cities, hotel room and occupancy statistics, etc.; lists possible sites outside Boston for proposed sports stadium and rates the marketability of each...