API copyright

No, there's not. It'd have to go through Congress, unlike net neutrality, and Congress right now would have trouble passing anything, especially with the amount of blowback a copyright extension would get. If Disney really wanted another copyright extension before 2024, they wouldn't have waited until now to start on it, and there's not a whisper of such a proposal. It's not like Steamboat Willie really matters; Mickey is protected by trademark, still has copyrights on more recent forms, and has value as a mascot more than a character.

On the other hand, in 2033, Snow White will go into the public domain, followed by the movies Gone With the Wind, and the Wizard of Oz in 2035, all of which have current value, unlike Steamboat Willie. Then Pinocchio, Fantasia, and Dumbo will go, and not too long after Cinderella, Alice in Wonderland, etc. will follow. So, yeah, I think there's going to be a try for another extension. Which is a reason why we need to not say "it may as well be infinite." It's a reason for us to say "getting these things into the public domain is awesome, and we're ready and willing to make a huge fuss about it." It's reason to loudly remind the world that Pinocchio was published in 1884, less than 60 years before Disney appropriated it, and it's about time we get to use Disney's version. Being complacent is just going to make it easier to steal the public domain from us.