I have a feeling the opening is imminent. They have almost finished putting the new drainage pipeline in down to the channel near Yas, and there has been an absolutely insane amount of landscaping being done this week in a real hurry, over an extensive area on all the newly-finished roads leading up to the new terminal. Everything is being tidied up and it looks like the construction is pretty much done now.

Plus, there's another thread saying 6 A380s are coming back by the end of this quarter. Coincidence?

I'm going to place my bet now that this terminal is due to open at the end of this quarter.

NB I have no inside info - it's just a hunch.