Wonder how many are going to hang off for the new 777,
The 777-8X will likely be a flop, in my opinion. It's too close in capacity to the 350-1000 or even 787-10 for an older design. And hardly anyone needs that much range.
Now, the 777-9X... That will be the true twin replacement for the 744, just like the 77W is for the 747 classic. And Airbus has nothing to offer against it, unless they double stretch the A350.