Yes this lens is due. Hopefully to have one by 1 Jul. for a trip later in july.It was on an early roadmap that stated it should be here by end of this year so hopefully that still is the case. It isn’t an S lens, but the Sony isn’t a GM lens either so I wouldn’t let it not being an S lens be much concern until we hear more. I am also very interested in the 400mm PF. All my long lenses are currently 5.6 and I’d like to get to F/4 without the typical size and weight. I have a preorder for the 800 mm PF, but I am still unsure on it.
Other questions I have is about the future of the 180-400. There is no replacement for it on the roadmap.