Once the terminal B-C connection is finished at Boston Logan, WN will move out of terminal A and DL will have all of terminal A to themselves (save Westjet). It is hard to say that the 20 something gates in terminal A could be hub sized... If Boston is really going to be a transatlantic hub, DL better get some flights beyond the three Europe partner hubs and a handful of leisure destinations aimed at Boston’s ethnic demographic (looking at you DUB and LIS).