In 2061, Black Panther will finally enter the public domain, 5 years after the Fantastic Four. By that point, most of the major Marvel characters and concepts will be in the public domain due to them having been created within a pretty short time span. This may not seem like much of a problem since only the earliest versions of these characters will enter the public domain. However, unlike DC and Disney, most of Marvel's major characters were created pretty much fully formed from the start.

Sure it would take a while for the more recognizable looks/aspects of characters like Iron Man, the X-Men, and DD to enter the public domain, however this would be a major issue for characters like the FF and Spider-Man for obvious reasons. With all that would be available atp, I doubt the only outcome would be low budget horror movies.

What do you think Marvel will do when 2061 comes around? If Sony somehow still has the rights to Spider-Man by then, could they just have their own versions of Johnny Storm or Stephen Strange randomly show up in Spider-Man movies without consulting Marvel? Could Marvel Studios retaliate by using Spider-Man and his 60s era rouges gallery freely in their movies? Could Universal make a Fantastic Four film without consulting Disney?
What is Marvel's/Disney's plan in the 2060s, regarding the public domain?