It was meant to be mid june then mid august and then mid august and then another 4 weeks was needed.... Has it got something to do with the Boeing 737 MAX spec needed to weigh against the A320 NEO. Now that we have a clearer picture we may have an announcement in the not so distant future.
I know that the 737 MAX won't be available before 2017 but since the 787 is late and some compensations are negociated, all of it may be put together in the negociations with interim/stop gap solution before a definite order is made.
It is just an assemption but since there is not much com, we can only speculate.