SquareEnix has revealed that there will be a spinoff of Final Fantasy Brave Exvius called War of the Visions: Final Fantasy Brave Exvius. There hasn’t been a lot of information released about the upcoming mobile game, but not a lot isn’t the same as none whatsoever.
For example, it is known that War of the Visions: Final Fantasy Brave Exvius will be taking inspiration from the Final Fantasy Tactics games, which were tactical RPGs.
Furthermore, it is known that it will be centered on the use of Visions, which refer to manifestations of powerful figures from various times and various worlds.
From the Final Fantasy Brave Exvius Wikipedia page:
Brave Exvius is designed as a turn-based role-playing game, combining elements from the Final Fantasy series with those of previous Alim game, Brave Frontier. Similar to Brave Frontier, the battle system consists of a simplified interface where players can command their characters to attack by touching the character’s corresponding attack button, and special attacks or items can be used by swiping the button and choosing the desired command.
The game also uses elements from the Final Fantasy series such as magic spells, character-specific limit breaks, and the summoning of creatures (known as ‘Espers’).
Characters are presented in a pixel art style. As part of the game’s gacha system, players can summon characters from past Final Fantasy and Brave Frontier titles, the rarity of which ranges from 1 to 7 stars. Players can then use those characters to build custom parties of five units. They can also recruit an additional sixth unit from other players.
Read more here: https://www.bleedingcool.com/2018/12/02/square-enix-announces-war-of-the-visions-final-fantasy-brave-exvius/