Boeing's new 777-8X is to be of similar size to the 300ER (up to about 550 passengers or so), but with the ultra-long range of the 200LR. The 9X is to even bigger, with a passenger capacity of 407 in 3-class layout. What would this correspond to in a 1-class high-density arrangement? I'm guessing around 600 or so?
Does anyone know for sure?