Looks like we'll have to wait even longer to get this hack 'n slash gem.
Capcom-Unity has announced in their forums that the release of the Wii U version of Dungeons & Dragons: Chronicles of Mystara has been pushed back to September.
This is the second delay the game has had after being originally pushed to August. The game released on other platforms in June of this year, and Capcom has previously stated that they are having issues getting the Wii U version out the door.