David, unless the younger ones (below 60[8D]) get in and take IMAA in a new direction do not expect much change. Expect to see continued sniping about past actions but nothing of substance that will attract other giant scale enthusiasts.
Like it or not AMA either by design or default has absorbed most of what was the IMAA of the 80s and early 90s. It may be really difficult at this stage to wrest anything back from AMA that would clearly show the reasons as to why an IMAA membership is a benefit. As I said in an earlier post, when is the last time you saw a new 40&8 club chartered?