I'm sure a lot of us have heard or seen a little hint about this already, but now there's something of substance to share!

L'Arc~en~Ciel are doing an ad campaign for Pepsi NEX!
The CM will air in full starting tomorrow, March 2 2010.

For now, Pepsi Japan has a static ad in the gallery section.

According to Pepsi's site, the song used in the CM will be [I Love Rock 'n Roll] by Joan Jett & the Blackhearts.
It will NOT be a L'Arc song. The CM is timed nicely to go with QUADRINITY but does not seem to have any more concrete ties.

EDIT: You can also save it in wallpaper size here:

EDIT AGAIN: The video is on the site too! Can't be saved any way I can tell though. Click TV CM at the bottom to view. There's also Interview and Special to watch ^-^

Sorry Coke fans