Doubt it, so far all Lumix G lenses (if Panny actually makes one for them) have the lens hood included.
EDIT: I don't see Panasonic mentioning 'weather sealing' anywhere in their press release. :think:
Ya, no weathersealing. I think it is just additional protection to make it less vunerable to dust and rain. It is a notch down from the 43 12-35/2.0. Therefore I will still keep my 12-50 from Olympus for the weather sealing and video record zooming feature.