Turns out you don't need your Xbox One connected online at all to get the day one patch. The title update can be downloaded in advance and loaded onto your console out of the box.
https://login.live.com/login.srf?wa...gency-offline-update&lc=1033&id=66262&cbcxt=0
https://login.live.com/login.srf?wa...gency-offline-update&lc=1033&id=66262&cbcxt=0