Riku from kingdom hearts.
He is a very popular character in the kingdom hearts world and even in the newest game his story line actually surpases Sora's. I would love to see Riku as a DLC character more than Sora and who know maybe he would be easier to get from Disney. Just a thought, and also in the new game, something very surprising happens that i was pretty shocked when i read it.
Do you have moveset of Riku? Plus Kingdom Heart characters such as Sora and Riku were owned by Square Enix with some Americanize Disney characters which Square Enix have a rights to use Disney characters.