Maybe it is construction for the 2. Stammstrecke? There is a safety shaft supposed to be built in that area for the new line but I can't imaging it would require that much land to be cleared. That whole area has been ripe for redevelopment for years. I remember Media Markt had a temporary location in a tent on that lot before they completed that shopping center on Einsteinstraße and Leuchtenbergring. I hope the construction is not too loud when we are there in October.