A three month lead sounds right. FFG just announced the third pack of the next cycle in AGOT, and the last pack of the current cycle should come out this month. I can understand steeling your expectations, but I don't think we need to be so pessimistic. With Netrunner being one of their newest games, I think they'll place a high premium on making sure to hit release dates; I would be quite surprised if we didn't see What Lies Ahead in December.
Past information on releases from FFG has confirmed that as far as they are concerned, Q4 runs until at least February. It seems there's a distinct overlap between Q4 of one year and Q1 of the nxt.
Or possibly just production delays, as happen all too often.
It doesn't make good sense to have Q4 mean a different thing than the general meaning when you are talking to the public, as opposed to talking about your fiscal year.
Regardless, I'd like to see the first one released before we start discussing the second one.
There's a preview up at the moment for pack #4 in the next cycle for Warhammer:Invasion, the first pack in that cycle hasn't hit the shops yet. Since all the packs in a cycle are designed and printed at the same time, FFG tend to show previews quite some time in advance.