I just think Canon should address this because if they brought out a 28-135 mk2 I would most definatelly buy it. What do you guys think?
I really don't see them updating this lens. It's Canon's only current FF-compatible non-L general purpose zoom lens, and 28mm is not wide enough as a general purpose zoom for a 1.6x crop body. If you have a FF body, Canon wants you to buy an L-series zoom for it (e.g. the 24-105mm f/4L IS 'kit lens' for the 5DII), and if you have a 1.6x crop body, Canon makes EF-S lenses for you. The 28-135mm was a good kit lens when it was designed - but that was back in the day when FF was the norm (i.e. film). In effect it was replaced by the EF-S 17-85mm (27-136mm FF-equivalent with a variable aperture), and that lens was recently 'updated' (replaced, in fact, by the EF-S 15-85mm).
The fact of the matter is that the vast majority of bodies that Canon sells are APS-C format, and there's a substantial price gap between APS-C bodies and bodies with larger sensors. If you're in the majority you buy EF-S lenses at shorter focal lengths (and often EF or L lenses in the telephoto range, since EF-S lenses don't really offer much benefit there). If you can afford a FF body, you can probably afford L lenses (or so Canon seems to believe). That's why we're seeing only EF-S and L-series lenses being updated/released, and no recent EF non-L lenses.