43rumors.com indicates a bright zoom optimized for the AF-100 (silent autofocus, smooth zoom, OIS) will be announced February or May. This could be a good thing...
http://www.43rumors.com/ft4-panasonic-is-preparing-a-12-50mm-f2-5-3-3-zoom/
http://www.43rumors.com/ft4-panasonic-is-preparing-a-12-50mm-f2-5-3-3-zoom/