In a year without COVID restrictions or closures, such as 2019, Disney's Parks Experiences & Products division on its own brings in more than $26bn in revenue — which is more than Netflix has ever registered.
A roller coaster through the upside down (Stranger Things), tea with the royal family (The Crown) or a fight with terrifying monsters (The Witcher) — a Netflix theme park based on its original content could certainly have some appeal. In reality though its probably in the "too big" bucket of rejected ideas in the Netflix boardroom. It's one thing to throw up an e-commerce website, it's another to try and a build a rival to places like the Disney Magic Kingdom.
Instead, recent leaks suggest Netflix is more likely to try and get into gaming, or at least more interactive content, in the near future. Video games are a business that Disney hasn't focused much on — preferring to just license out the use of its brands (such as Star Wars) to video game makers.