screenrant.com -BY DAVID MILLER - Tony Stark's death door palladium poisoning was a major plot point in Iron Man 2, but he was making preparations for it from the start of the movie.
screenrant.com -BY XAN INDIGO - The Arc Reactor's element stores and releases huge amounts of energy. There are two metals it could be, and both are audacious possibilities.
www.cbr.com -BY SANDY SCHAEFER - Iron Man 2's lukewarm reviews fundamentally affected Marvel Studios' approach to crafting movie sequels for the Marvel Cinematic Universe.
screenrant.com -BY DREW DUNLOP - Thanos and Howard Stark both saw the same problem, but had different solutions - which Tony Stark was able to implement via the arc reactor tech.