From what I heard it's very unlikely they will do both but said they could do other tracks during the show from the High n Dry era they haven't played in a while. Just like the Viva Hysteria show ended with ROck of Ages and Photograph, they will likely throw in some of the popular tracks off hysteria that they always play live to round it out.

They could just extend their opening set a few songs to make up the time which is where we're likely to see a few high n dry tracks.