Wow, they both looks just fantastic. To me, they don't look like Pokemon; I guess to me they look more that monsters you'd see in underground animes geared towards young adults. But, I like them both. I also noticed they both have similarities to Palkia. To me, it looks like they have turbines on their tails, which could be a clue about something. They are both very detailed: maybe showing Pokemon's maturity? I mean, even the 2 playable characters are older than 10 years of age like past playable characters.
I also find it really awesome that pokemon.com has updated with this information at the same time as the Japanese site. Maybe the Pokemon Company, Pokemon USA, or whoever decides what goes on with the American Pokemon franchise has finally come to understand that America is not blind to what goes on with Japan's Pokemon. For example, maybe they've realized that most hardcore Pokemon fans in America are people who are in their late teens and older, so they'll stop targeting it exclusively to children. Having it targeted to everyone (children, teens, and adults) like in Japan would be fantastic.
Overall, I'm excited to see the types of these 2 Pokemon. i think Zekrom will be dark/dragon and Reshiram will be ghost/dragon. ghosts are white, and its tail and and flowing mane on its head look "ghostly". i can't wait to see more legendary pokemon!
Also, I find it funny that people were going to pick black but now they have decided on white because of Zekrom. I was originally going to get white but, if black ends up being the less popular, I'll get that. I always get the least popular of the two.