Square Enix is celebrating the holidays with some nice art. Specifically, art thatwas shared on the official Japanese Bravely Default Twitter account.
This seems to tease a Switch port for the games (or a new game), since Edea Lee has the Joy Cons in her hands. This is not without precedent as Platinum Games did something similar with Bayonneta before Bayonetta 1,2 and 3 were announced for Switch.
However, at this time it remains speculation. If anything is announced, then we will share the news immediately.