In speaking to "the informed" then I understand that it is no longer a question of "IF" but rather "WHEN" as the decision has now been made within EK to upgrade the NCL-DXB to a 777, timing being dependent upon the availability of a specific version of aircraft from fleet, as due to operating restrictions then only one version is able to comply.
Now if I was in marketing then it would seem that 26 July would be too good an oportunity to miss to showcase the forthcoming product