Basically, we have an opportunity to work together to create our own characters and our own stories that we can all collectively share and own and use without Disney or Fox or Sony or Discovery or Max or Paramount or whomever being involved.
And I believe that, more importantly than it being possible, it is neccisary for us to create works that explicitly encourage this kind of creative reuse and reinterpretation.
That's why I advocate for CC-BY-SA and not just CC-BY.
CC-BY-SA means "reuse this however you want! but also release your remix under the same terms."