This is the announcement I have been waiting for all year! The legendaries are one of the main reasons I'm still into Pokemon... :D Reshiram and Zecrom FTW!
As for critique...those are the best tails on any animal/beast/monster I have ever seen... I've always wanted a drill-tail concept, but I'd figured it would get ruined if implemented... but these TURBINE TAILS look EPIC!
Both Pokemon look awesome! Game Freak is on a fiery streak so far with their release of Generation V Pokemon! I'm extremely annoyed by the switch thing, though... Confusion ensues...
Reshiram looks mystical, while Zecrom looks like a freaking threat. You would not want to encounter that [Zecrom] anywhere (unless it was on your side :D). I love the names as well, as they signify that each Pokemon is turning to their respective color.
Reshiram reminds me of the concept of reishi from Bleach, coupled with the term 'ram', resulting in the Pokemon personification of spiritual energy ramming into your enemies. Which is freaking awesome.
I like how Zecrom feels when you say it. :) Something powerful and enigmatic, yet seldom seen. Originally, I wanted a 'u' in there to make Zecurom, but now I feel that would distort the name too much for my liking.
As much as I like Dragons, this typing thing (which isn't actually confirmed, as these guys may be dragon-like similar to Charizard and Gyarados) is a bit much. I'm wondering what their sibling, if any exists, will be... Zecrom being dual-type Dragon/Electric or Dragon/Light would be interesting. Well, at least the Dragon-type matches the epicness of Reshiram and Zecrom in a way... 2 Dragon trios could be awesome, though, if implemented correctly...
Either Reshiram, Zecrom, or their 'sibling' should learn Luster Purge... Fits with the whole monochrome idea. These guys made me have an idea that in the plot, there should be an event where one of them causes the overworld and battle scenery to go monochrome/black-and-white for a while. Then it'd sort of feel like you were playing a Generation I game in Gen V!
Ugh...the version switch thing is just what bothers me. How can you have a vicious menace like Zecrom representing the color white? From the outset, one could think it was full of malice or something from its portrayal/design... I get the yin-yang symbolism, but still... :\
Keep up the excellent work with Pokemon designs, Game Freak! :D