Reshiram and Zekrom shown during Gen`ei no Hasha:Zoroark Screening
Aside from WPM`s pictures of Minezumi and the mysterious new Pokemon, Shutupnowordie666 has also provided pictures of the teaser trailer and more of the B/W Commercial during the movie which shows Zekrom and Reshiram. Images can be found below:
It seems that the Pokémon of this region focuses on machinery and advanced technology. Reshiram's tail looks like an oven while Zekrom's is more like a fan.