A (presumably ex ) friend of mine put a lot of work into the designs for the new Bethel near Milton Keynes that was abruptly cancelled after 9/11. He was a bit annoyed about it as he had done a lot of unpaid work and no explanation was ever given. Rumour was that the GB had decided that Armaggeddon was imminent.
The WTBTS will get a lot of money from selling the properties in Millhill though I see the old Bethel in Ireland is still for sale. http://cms.mol.ie/uploads/Watch%20Tower%20House,%20Newcastle.pdf
As ever - the WTBTS business model is build with tax free (slave) labour - hold for a few years - sell. Rinse & repeat. Looking at the accounts , the properties might be worth close to £100 million.
http://apps.charitycommission.gov.uk/Accounts/Ends61/0001077961_AC_20120831_E_C.pdf
http://apps.charitycommission.gov.uk/Accounts/Ends47/0000216647_AC_20120831_E_C.pdf