I have not heard any news about this. Would be interested if it's true, since I am considering getting the 100-300 in the next few months, and so would probably get the older version at a discount if there was a new version...
Well I went to Kenmore camera site and saw it along with the older model. New model the 100-300mm ii is on order 100 bucks less and older version that is in stock. ??? Maybe its a smaller version for the gm line I have no idea. I have bin looking for any info on it on line but have not found anything yet.
This might be a pretty good indicator of an updated lens. Kenmore Camera seems to have a close relationship with Panasonic and usually gets lenses in stock fast. They might of gotten advanced notice of a new lens? Hopefully it gets slightly improved optics and a size reduction similar to the 14-140 II.
Sorry to burst your bubble guys, but if the only basis for the rumour is the Kenmore Camera listings, it looks to me like "2ND" just means "2nd hand" or maybe "refurbished." There's also a "2ND" listing for the 35-100 and 45-200, and in every case it's a good chunk cheaper than the retail price they're selling the new models for.