Pokemon Black and White too dark for kids?

First of all, I want to say I can't wait for Pokemon Black and White, which is coming next month. I am a big fan of Pokemon since the first games. From what I can tell, the fifth generation of Pokemon will be a bit more darker than the other past games, and I might have found one evidence to confirm that fact.

A special area will be exclusive to each version of the game. For Pokemon Black, an area will be available called Black City and for the White Version, White Forest. The Black City will represent the advances of technology while the White Forest will represent the purity of nature. It seems that one theme of the fifth generation of Pokemon will be a figurative battle between nature and technology. But in a more dingy perspective, it could be a secret debate of religion and atheism.

I might be just throwing darts in the wind, but if this "battle" is the intention purpose of the game, then I fear for the kids playing the games when it comes out March 6th