As written, it could only apply to 2 companies, Universal and Disney (as those are the only 2 companies that both are in the movie production business and also operate theme parks), and both Universal and Disney are (or at least last month were) over $150 billion in market cap. A bill that narrowly drafted has been held to be a bill of attainder in almost every circuit in the U.S. (A bill of attainder does not need to be limited to a single target; what makes it illegal is that it is narrowly drawn and attempts to legislatively punish a person or entity for otherwise legal acts.)
The punishment part is that the bill would retroactively limit copyright extensions for just those two companies 1 28-year term, and Disney copyrights would expire automatically upon passage of the law for everything dating back to at least Fantasia. Note that retroactive termination of copyright law is not permitted by our existing copyright laws, nor is it permitted by international treaties to which we are signatories.
Or, in other words, it's unconstitutional multiple ways, and is a blatant attempt to exert fascistic coercion over a business with different ideological concerns than the author.