The next update which comes with the free boss characters is out today along with the first DLC pack for the game which includes another Adventure Map the same size as before, new prequel scenario, and some new items, such as Epona for Link. Epona is pretty fantastic, probably my favorite weapon of Link's so far (Haven't unlocked the Great Fairy yet) mostly because of the mobility. You slash and strike as you continue to move with the horse, so it cuts through minions and everything really great.
Haven't done the scenario yet for Cia, but I'm liking playing as Cia, though I'm not normally fond of the specials that kinda just hold you in place too much. Volga seems cool, but only did one level, and haven't played as Wizzro yet.
The adventure map this time around looks like it'll unlock some new options for your weapons and at least one new recolor costume for everyone I assume as Link's first costume you unlock in it is a purple version of his Hyrule Warriors outfit. Only minor disappointment I'd say is that the map itself is exactly the same as the original one, just with all the challenges and items being different. Kinda woulda been cool to have it be Zelda 2 or a Link to the past instead I guess, even if the map itself really doesn't matter. Also a little bit of a challenge to it is that each challenge on the map has an assortment of like 6 or so handicaps, like being unable to guard or get healing items, stuff like that.
Overall, just more content that is gonna keep me playing for a good long while as I'm not even done with standard game yet lol