Yeah. It'll be minor, both because they need to focus on the Mini 4 and the Pro, and because there is not much that they can do. I predict A9, longer battery life, improved cameras and Force Touch. That should be enough to call it a day (or year). I can't see them not refreshing their most popular line of iPads, which will probably still stay the most popular after the Pro releases.
Might not be significant, but look out for it.