Dragon Quest Heroes, the collaboration between Square Enix and Omega Force to develop am Dragon Quest themed Warriors game, but with more RPG elements, was an unexpected hit when it released on PlayStation 3 and PlayStation 4 in Japan earlier this year. it seems to have been so successful, however, that a sequel has already been announced. Dragon Quest Heroes 2 has been confirmed to be under development, and it will be releasing on PlayStation 3, PlayStation 4, and also on PlayStation Vita.
Not much more is known about the game yet, except that it exists. Really, all that we have to go along with it is the logo accompanying the announcement, that you can see above. Still, based on the first game, it is probably reasonable to assume we know what the4 game will be like, except maybe bigger and expanded.
The original Dragon Quest Heroes came out on PS3 and PS4 in Japan in February. Its release is planned for the rest of the world later this year. There is no western date announced for the sequel yet.