I expect them to start by putting the KM in a locked file online, having the PO or other elder, print out a copy and then make photocopies for the congregation use. This could expand to later doing the same with the 'study edition' of the Watchtower. This would cut massive printing volumes, and sacrifice nothing in the public image area, since those mags would still be printed at HQ. BOE letters could be done the same way. And meeting invites also. All the costs get absorbed by the local brotherhood, and can be done easily nowadays with the copier technology without a lot of loss of ascetics.
Later, combining the Awake and Public Watchtower would be very feasible and probably on the drawing board IMO already. Perhaps the Public edition could become a quarterly also, reducing printing cost by 75% on that publication. Shelf life would increase in that way also. They could supplement with occasional 'mid-season' release of a brochure, that also would keep a long shelf life being undated.
I expect them to create more 'witnessing' with tracts, creating entire periods in which the Public magazines have smaller circulations. Tracts are far less costly and JW's are getting lazy and tired of the preaching. The 'witnessing work' is primarily for the JW's anyway IMO, in keeps them convinced they are doing a vital work, and tied into the Watchtower organization.
Later, the 32 page Public Edition could become a 'streamlined' 16 pager, thereby cutting 50% more on the paper and ink cost.
Jeff