I'm unsure if this is really warranted, but a few things have reached my ears.
As mentioned over in the Autumn of Fliers thread, this image pops up in the new WD:
As largely hinted, this is most likely the Fighta/Bomber kit. But then why focus it on just Orks and not fliers in general?
A few hints as to other finished kits have been floating about for a while, but with no time-frame, so there is a slim chance this is an actual release.
Grape vine has it that there's:
Big Gunz kit.
Deffkoptas kit - new starter box in June or July, very popular unit, makes sense on GW's part to make a proper release.
Warbuggies/trakk kit - Rumours about this kit have been floating around for ages, supposedly finished.
Megabobs in plastic - pinch of salt, again too many rumours to count that in some ways there are no rumours.
Any validity to any of this? Haven't seen any other info around the interwebs lately about this subject so it could be wild speculation.