interesting video from The Ritual Project about the disappearing art of large format poster painting. in a world of two to four week posting cycles, where campaign after campaign comes then goes, there's much to be said about investing in this kind of permanence. a presence that doesn't vanish as quickly as it appears; a commitment to a space, rather than a transient placement in it.
there's a whole load of reasons why this wouldn't be right when planning a campaign... the time and effort to get planning permission, the fact that there'd only be one site, the production investment in man hours, the fact it couldn't quickly and easily be taken down if necessary, lack of MOVE / PostAR data... to name just a few.
for all those reasons and more most brands wouldn't do it.
I'd call that an opportunity if ever there was one...