Exactly.Usually we expect more than we get from Apple.
In my opinion that is most likely.My prediction, if I was forced to bet on it right now:
iPad 8 identical to iPad 7 but with A12.
iPad Air 4 will have the Pro 11” design but with a 10.8” screen. A12 and 3GB RAM.
Maybe If they still use the same chassis in Air 4 as in current Air 3, we could get slight bump in specs along with bigger display. Anyway, my point is that we are no going to get all the goodies in one year and definitely nothing like Pro 2018 renamed as Air like it is in the wildest rumors I've seen.