According to the Japanese page for Hyrule Warriors on the eShop, this game may be getting some additional content released as DLC. A translation of the page says, “Additional characters, weapons and scenario are planned to be distributed.” This news seems to coincide with a recent tweet from the game’s official Twitter profile which stated Hyrule Warriors would be getting long-term support and expansion.
As of now there is no word on what kind of content will be released. We will keep you updated as news comes.
Source: Twitter