Since gumi Japan announced a sequel for Brave Frontier earlier this year, we hardly get any update of it but recently it is finally confirmed for a release this winter under the name Brave Frontier 2.
From all we know, new battle systems such as XBB (Cross Brave Burst) will probably be added to the game. No much information of the sequel is available now as it is currently still in development, but it is planned for Japan and “outside Japan” so we may hope for a global release soon.