Final Fantasy Adventure is the North American title of the first Mana series entry, originally released as Seiken Densetsu: Final Fantasy Gaiden in Japan. Its sequel, Seiken Desetsu 2, released in both North America and Europe as Secret of Mana.
We last saw Final Fantasy Adventure as a 3D remake called Adventures of Mana for PS Vita and smartphones in 2016, but it also appeared as part of the Japan-only Seiken Densetsu Collection for Switch that featured Seiken Densetsu 1 through 3. Secret of Mana also got a 3D remake on PS4, PS Vita, and PC that released worldwide in February 2018.
Since we’ve only had two of the first three Mana titles trademarked in the West we can’t say that Seiken Densetsu Collection is definitely making its way over, but that doesn’t mean it can’t happen. In any case, we’ll be keeping an eye out for what could be a possible Seiken Densetsu 3 trademark or other Mana-related announcements.