Of course this one is far smaller than the rest, being only three dollars instead of eight (unless you bought the season pass, then that's a moot point anyway), but it still features some nice goodies. The free update that comes with it features new potions, new medals and another level cap increase. The latter feels unnecessary considering how little content is being added this time, but I guess it answers the question of how Twili Midna, Young Link and Tingle will get their full three rows of hearts. It's also meant to solve the problems with the longer load times since the MM pack came out... let's hope it works out a bit better than the PS3 version of Sonic 2006, eh?
As for the DLC, aptly named the "Boss Pack", it consists of two extra scenarios for Challenge Mode: one where you fight a neverending gauntlet of giant bosses (maybe as a more difficult version of the boss rush mission on the rewards map?), and one where you FIGHT AS GANON. No no no no no, not Ganondorf, GANON. It goes without saying that he's not going to be playable in any other modes, but that's still the ultimate form of fanservice (then again, the ENTIRE GAME is fanservice, so...). These scenarios will feature some extra costumes as rewards, and Link, Lana, Zelda, Ganondorf and Cia will be the lucky recipients. Presumably these are going to be costumes based on the giant bosses, since everything else in this pack is.