Domain 3 and Domain 4 actually aren't 'site names' - they are the names of the existing buildings, although when they are replaced the new buildings will probably keep the same names. They are both 100% leased to multiple tenants. They are marked on that map as potential redevelopment, thus the teal circle. There is probably a long term plan, but I don't think redevelopment of those sites is imminent.
OK. I actually confused Domain 3 and Domain 4 with Domain III and Domain IV. The Roman numeral versions of the two are the 300 footers going through permitting that will be squeezed in by IBM Bldg 45.