Japanese trademark filings are usually a good way to figure out what sorts of projects are in the works.
Everything from new games to new anime and manga projects can be sussed out in such filings, and if the latest one is any indication, the wallet and time draining unholy smartphone app vortex that is Fate Grand Order could be set to drain player wallets even faster, in Japanese arcades.
While the above logo for the game is all we have to go on at the moment, it wouldn’t be too much of a stretch to expect this version of Fate Grand Order to further play up the card aspect of the smartphone game.