I'm not a huge fan of Tekken, but I do still have a bit of a fondness for Pokemon. That being said I'll more than likely pick up Pokken Tournament on the Wii U when it comes out, but now and other fans will have a new force to contend with: Shadow Mewtwo.
The new trailer posted to "The Official Pokemon Channel" on YouTube shows off many of the contenders in the game, including Machamp, Gengar, and Gardevoir, as well as a new challenger: Pikachu Libre...so are we going all Street Fighter now and having two versions of the same character ala Ryu/Evil Ryu? Anyway, at the end of the video we get a glimpse of Shadow Mewtwo, but that's it. If I had to guess with a name like Shadow Mewtwo he'll likely be a boss, but that doesn't mean he won't also be playable, which would be awesome in my opinion.