It would appear that there might be some hope for this after app. The original post from Crudbytes has a tiny update at the end. There isn’t much detail, but it’s worth keeping an eye on to see how this develops.
But you might be wondering why we would need another inter-app communication standard now that we have IAA and Audiobus 2 is almost here. Well that’s a good question. Let’s see where they go with this and perhaps there’ll be an answer.