We just received some big news about a potential shift in how FFG sells its LCGs, but folks may have missed it since it came in the guise of a Call of Cathulhu announcement.
"Seekers of Knowledge will be more than another deluxe expansion; it will be the first in a new release model for Call of Cthulhu: The Card Game. The game will shift away from monthly Asylum Packs to the release of a deluxe expansion (each with 165 cards) once every four months."
So, nothing definitive here for LotR, but I see some clear signs. First, we have the announcement of the two hobbit themed box sets. Second, we have no news about any upcoming adventure cycles. And, FFG has stated that it is shutting down the entire concept of monthly packs for one of its other LCGs.
If I was betting, I would put money on the fact that Shadow & Flame will be the last adventure pack for this game. Time to embrace the boxed sets.