A new update is set to arrive for Hyrule Warriors very soon, with this update we will get a series of upgrades from basic game things, all through to actual bug that is about to be fixed, here is what exactly will be affected by the update 1.6.0:

Max level raised
New mixture potions added
New medals added
Challenge mode expanded
Score recording function added
Challenge scenarios added
Bug that extends load times when entering battles fixed

Source