Was just reading the old Feature Intyerview with Mike K and came across this. May not have come to fruition, but it's a better hint than I have seen elsewhere:
Of course Old Mac was the fourth course, but still...
28. Who will he select as the architect for the 4th golf course, and why?
I’m very impressed by Kingsbarns, so Mark Parsinnen and I have talked often of collaborating. We’ll see.