To be fair, all the EOR Chapters have been referenced if not outright continued in some fashion during Part 2, Shimousa being the biggest one with Traum being a mix of both Shinjuku and Agartha, so i don't think it's exactly crazy to think that Salem will retroactively be more important before Part 2 ends.
There's been more than enough hints that this could be the case and if it is indeed Meteo writing LB7, then it lends even more credence to this prediction.