Nikon D4 - & upcoming Lenses

So the D4 is supposed to be released midyear - im waiting to upgrade instead of getting a D3s - I currently have no FX format lenses & was thinking of a 24-70 2.8 & 70-200 2.8 setup..

Id like to get the lenses now, but my question is should i wait to purchase these lenses with the camera, albeit a better deal - or maybe there are newer model lenses coming out or upgrades coming to current ones after D4 release or soon. trying to figure out the best path.. any advice suggestions?

thanks in advance! -Alex