And meanwhile, I think stuff like fan art, fan fiction, spin offs, etc could maybe create an even more vibrant ecosystem than a Disney or Nintendo ever could.
I mean, look at the ancient Greek and Roman mythology. That was an open source ecosystem of stories and legends that different people contributed to and built on over long periods of time. It could easily happen today.
Open Source Disney, Open Source Marvel, Open Source Nintendo
I think the time is right for such a thing to happen.