Wizards pointed it out themselves, they've been equating the last few blocks as horror/disaster movies. Alara shows a plane-wide destruction (unless my memory's off), Zendikar has the Eldrazi roaming around, and New Phyrexia is...well, New Phyrexia. An interesting thing to note about Rise of the Eldrazi, each of the artwork for at least the colorless Eldrazi takes place during the daytime.
In Fearful Day, In Raging Night, with strong hearts full, our souls ignite. When all seems lost in the War of Light look to the stars--For HOPE BURNS BRIGHT!
I don't care about my pokemon other than their battling potential. If they aren't good at battling, I'm not going to use them. If I have to spend time getting my pokemon to be perfect, so be it. I'll battle your pokemon that are "raised with love" anytime, and you know what? I'll probably win.