Disney can keep using him as a trademarked corporate logo, that's all they really need.
That is funny, because I think most Germans born in the 80ies to mid 90ies would disagree. We got a daring adventurer and a hard-boiled detective. I don't think it was content specifically produced by the German publisher for the German market, but it is possible, that there was more focus on that content opposed to "classic mickey".
Edit: I looked it up: It looks like the detective stories were English, but first compiled for Denmark, whereas the adventurer stories were from the Italian publication "Topolino".
I was passionate about PK (paperinik or super donald duck), but that is not a thing in north america!
He is called Phantomias in Germany.
https://disneynow.com/all-shows/disney-junior?group=kidsafe&...
Spider-Man is owned by Marvel, which is owned by Disney.
Sony has an exclusive license to the film rights which they will eventually lose and cede back to Disney.
Not if they keep making a reboot and two sequels every few years (contract is one film every 5 years, AFAIK)
What about something like Mario? Will it eventually go in public domain as well?