43 Rumors reports that Pana dropped the 150 for the 15mm Leica. Personally, I think that's cover for cancelling it due to the Olympus 40-150/2.8. I don't think the Panasonic lens was going to be much smaller than the Olympus. It probably wasn't going to be much better sharper, as we've all seen how the pro zooms can stand toe-to-toe with the better primes there. I don't see that much of a value proposition for the 150/2.8 and it looks like they didn't either. http://www.43rumors.com/new-gm1-and-lens-news-and-tests-roundup/ And the new 35-100. Looks a lot like the 45-150.