So February looks like a new release for 40K, and this time it is an update/add-on to the flyer rules in 6th edition. From reading various internet reports it does look like some aircraft get an update, stormtalon and night scythe for example, and other races without flyers get one. Tyranid players will probably still not be happy.
The only aspect that I've read that I am not happy with is that there may be the extra optional rules and flyers mission that appeared in Crusade of Fire only a couple of months ago. That strikes me as both a waste of time (they were terrible rules) and a snub at the people who bought that book.