A trailer appeared on Tecmo Koei’s official YouTube channel that accidently went live ahead of Nintendo’s upcoming E3 press conference showcasing an unannounced 3DS port of last year’s Hyrule Warriors.
In addition to content found in the 2014 Wii U original version of Hyrule Warriors this new portable edition includes two new playable characters: The King of Red Lions and Tetra from The Legend of Zelda: Windwaker. Apparently the 3DS version also includes some sort of compatibility with Wii U version as well, I am uncertain of the specifics because the leaked trailer is entirely in Japanese.
Even though the original video has been de-listed from Tecmo Koei’s Youtube channel you can find mirrors of it all over the internet, one of which I’ve embedded below. Expect more details in the coming days!