Okay, I've gotta say, Hyrule Warriors Legends has some awesome DLC. Reason is because it takes side characters who some people might not have even heard of and turns them into full-fledged warriors.
Like Marin, from The Legend of Zelda: Link's Awakening, for the Game Boy. In the game she came from, she was just a side character who wound up developing a crush on Link and taught him the Ballad of the Wind Fish, which was necessary for being able to beat the game. Now, she has been given one heck of an upgrade, going from an 8-bit sprite to a beautiful-looking character who uses a bell to perform a variety of attacks, some of which include summoning the Wind Fish.
And Medli, from The Legend of Zelda: The Wind Waker for the Gamecube and Wii U. Originally a minor character until she was revealed to be the Earth Sage, she helped Link through the Earth Temple, but then, after helping restore some of the Master Sword's power, she had to remain in there to pray so that it would continue to hold the power she had given it. Now, she has been made a fully playable character, using the Rito Harp as a powerful weapon.
And there's also Ravio, from The Legend of Zelda: A Link Between Worlds for the 3DS. Originally just a cowardly item merchant who let Link rent and later buy items, he was later revealed to have been Link's counterpart in Lorule, a hero, but his cowardly nature kept him from being able to stop the sorcerer Yuga from manipulating Princess Hilda of Lorule, forcing him to instead find his Hyrulean counterpart and provide him with assistance from the shadows. Now, he uses the Rental Hammer to bash enemies in battle, although his in-game dialogue indicates that he is still just as much of a coward as ever.
All in all, touches like this are just one of the reasons I feel like Legends, in spite of being a 3DS game, is a greatly improved version of the original Wii U Hyrule Warriors game.