I've said it before, and I still believe that K/G is a growing threat to Red Bull, RockStar, and to some extent, even Monster.
Monster is so dug in though, and they have held their popularity by slamming the market with so many varieties. Ultimately K/G will have to do the same and/or get variety-jiggy with their design logo, which is already good, but maybe it could be made even better?