Part 4/11:
In an in-depth analysis, experts and fans point out that Marvel, and by extension Disney, likely knew about the Japanese "Iron Heart" parody prior to launching their own character. Trademark filings for "Iron Heart" in various jurisdictions reveal a timeline where the name was not officially registered until after Marvel’s character debuted. Specifically, the parody film had extensive online availability and was well-known in niche circles long before Marvel’s Iron Heart appeared.