Square Enix is lending the Fullmetal Alchemist series to Maple Story maker Nexon. While Edward Elric won’t be in that game, something from Fullmetal Alchemist is planned for another Nexon MMO, Mabinogi. Specific details about the collaboration have not been announced.
Nexon added alchemy to the Mabinogi universe. Perhaps, the tie up will be related to that part of the game.