Star Ocean 5 will not have any DLC or Expansions.

[Mystro-Sama]

AbbathTheGrim said:
If adding DLC to get some more profits would help Tri-Ace to be a little more profitable and see easier ways to keep releasing them rare JRPGs, I would gladly embrace DLCs for their games.

And if the dlc expands the scale of the game and is reasonably priced then I don't see the problem.