A new trailer for Guitar Hero: On Tour, the DS version of Guitar Hero, has just been release.  It shows the what the new peripheral will look like and how it will work.  Instead of the usual five fret buttons like on the standard guitar controller, this new one for the DS will only have four fret buttons and it will stick directly into the GBA slot.  Also it will include a small "pick" that you will use to strum with on the device's touch screen.  From the looks of the new trailer this system will work really well, but tho only problem that I am gonna have with the series is that it will be too limiting.  I feel like the difficulty level is going to be turned way down because it is on a portable system and also because of the lack of the orange fret button.  On the console games, you only use three fret buttons on easy, and four fret buttons on medium, so they might or might not limit the game to those difficulties and just relabel them 'Easy' and "Hard'.  Anyway, check out the trailer after the break.  This game still looks like it will be the best DS game around no matter how easy it might seem to be.