Its not the Nexus, the build name suggests its the LG Optimus G2 for t-mobile
Nexus 4 had mako/occam codenames, this fits in with LGs product line rather than Nexus series
And other than fansites trolling for hits, it has never really been confirmed that LG has the contract this year
Whether or not LG got the contract the specific S800 variant would make a fine candidate for a Nexus5.