Disney would most likely use trademark law to go after hail-hydra.com. Don’t use “IP” as an encompassing term, each of the different types of IP have different laws and standards.
Trademarks can contain commonly used words. And the trademark is most likely on the phrase “hail hydra” rather than on a single word (although i can’t actually find a trademark on that phrase, but my search wasn’t exhaustive). Otherwise Apple Music and Apple Computers couldn’t be trademarked.
In fact multiple trademarks for exactly the same word/phrase can exist if they are different areas. The trademark database has several existing trademarks on the word Hydra for different usages.
The fact that i’m using it satirically could be of some help, but honestly i’m not going to put up a huge fight over it. It’s an entertaining joke, not something to stake my livelihood on.
