I don't mind the new sound track. It doesn't sound as evil as B/W's music which you linked to, but the point is less about being evil, and more about being exhilerating.
Plus, I'd agree with Night Fox. We don't know the context of that music sound track. I don't know who the fellow is who it's against or what he has done or does, or even when you fight him, which can make a difference in the intensity of the battle music.
I'm still gonna get it when it releases in Europe though.
And I actually really really want a Gen 6 game to come out, just so I can see it incorporated onto the 3DS...
Mind you, that's if they ever consider it worthwhile. 3DS sales aren't especially big, and Pokemon sells well, so they might just stick to the DS/DSi, since it's safer.
Aaaand I've still gotta wait for them to release B/W2 and then, if they decide to do it, the Gen V remake of Sapphire/Ruby/Emerald, which I will also look forward to, as I loved Gen 3, since it was my first Pokemon game that wasn't a hand-me-down from my older brother.