According to a post on the Flats on D website, Jimmy John's plans to open within the new apartment complex on D Street in Southie, just south of the heart of the Seaport District. The post says that the sandwich shop will move into one of five retail spaces at the complex, with this being the first business to open there--and the first Jimmy John's to open in all of New England. There doesn't appear to be an opening date for the shop as of yet, so keep checking back for updates.
[September 5 update: According to a tweet from @FlatsOnD, the new Jimmy John's in South Boston is now open.]
Jimmy John's first started out in Charleston, IL, in 1983, with the chain of eateries having more than 1,900 locations across the country today. The shops feature gourmet sandwiches with bread baked in-house each day and meats and veggies sliced fresh in-house every day as well (no additives or vegetable-based fillers are used, according to the chain's site). Sandwich options at Jimmy John's include "plain slims," 8-inch subs, giant club sandwiches, and the "J.J. Gargantuan," which has salami, capicola, ham, turkey, roast beef, cheese, veggies, and dressing, all stuffed into an 8-inch roll.
The address for this new sandwich shop in South Boston is: Jimmy John's, 411 D Street, Boston, MA, 02210. The website for the chain can be found at https://www.jimmyjohns.com/
Thanks to @ClaireInBos for bringing this to our attention.
Tweet