New I mean, new ground sign, layers taxiways and runways
There will be no such thing. We are not planning for a minor update just to update signs, taxiways and runways.
We are redoing the scenery from scratch, because it's really showing its age now (it was released in 2008), and it would be wrong trying to patch it again, since we already did such update in 2011, when they added runway 9L/27R, which is the current version.
This means, it will take just like any other new scenery we made in the last years, from 18 to 24 months. Some work as already started on it, but I don't anticipate to be ready this year.