Disney is unlikely to attempt to push through another copyright term extension (see https://arstechnica.com/tech-policy/2018/01/hollywood-says-i... for fuller details). The two main reasons are that there is a much more forceful caucus in politics against copyright extension than there was 25 years ago, and the arguments for doing so are weaker (the copyright extension 25 years ago was partially driven by raising copyright term in the US from "life + 50" to "life + 70", in line with European standards).
If one pays careful attention however, one would note that Disney has, over the past few years, started using a clip from Steamboat Willie more aggressively in its films, which has led many to wonder if they're planning on taking down anyone who distributes Steamboat Willie on the basis of trademark violations instead.