It seems that we could finally see the Seiken Densetsu Collection receive a Western release date as Square Enix have trademarked “Collection of Mana” in Europe. The trademarked was done on May 31.
Seiken Densetsu Collection is a collection of the first three Mana games. This includes Secret of Mana, Adventures of Mana, and Seiken Densetsu 3. The collection released in Japan back in June 2017 exclusively on the Nintendo Switch.