I do wonder what will happen when it enters public domain. Will it have been too long, so nobody will bother creating merchandise and derivative works? Or will there be an explosion of Calvin and Hobbes material? I can’t think of a comparable test case.
That won't be for another 70+ years since Watterson is still alive and it was created after 1977. I can't imagine there'll be that much demand for C&H merch by then