You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including Iron Man. There are also some great stories on Fanfiction.net. Just use the search bar and type in 'Iron Man lives' to filter out the relevant stories.
In some fanfiction, Iron Man lives and he finally manages to perfect his time - travel technology even further. He uses it to visit different timelines and alternate universes, meeting different versions of himself and his friends. This allows for some really cool crossovers and exploration of different storylines that were only hinted at in the movies.
The placement of the Avengers in Iron Man 3 fanfiction can be all over the place. It could be that they show up to assist Iron Man, or they might be off on their own missions and only mentioned briefly. It all comes down to the imagination of the fanfic writer.
One possibility could be that Naruto goes to Iron Country to learn new forms of combat or to train in their unique ninja techniques. He might face challenges in adapting to their strict and disciplined way of life compared to Konoha.
One possibility is that Naruto goes there to train in a different style of combat. The Land of Iron is known for its samurai, so he could learn swordsmanship and their unique fighting techniques. This would make him an even more versatile fighter, adding to his already impressive ninja skills.
You can try your local comic book stores. They usually have a good selection of Iron Man graphic novels, including ones related to the Iron Monger. Some big chain bookstores might also carry them in their graphic novel sections.
There are many speculations about the man in the iron mask. One theory is that he was an illegitimate son of Louis XIV. He was locked away with an iron mask to hide his identity so as not to cause a scandal or a threat to the king's power. Another view is that he was involved in some sort of political intrigue at the court. However, the exact truth remains uncertain and has been the subject of much debate among historians.
In the story, the man in the iron mask was a mysterious prisoner. His identity was kept secret, and he was forced to wear an iron mask all the time to conceal his face.
Iron Man's origin in the comics involves Tony Stark getting captured and using his engineering skills to create the first Iron Man suit to escape. After that, he continued to improve and develop the technology to become the hero we know.