system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Was Tony Starks first draft of the IM suit in the cave or did he have ideas for it before?

Either from comics or movies, just interested in knowing if there was any sort of proof that shows he had ideas for the suit before being in the cave.
gpt
It doesn't seem so. It seems his abduction by the Ten Rings was the first time he thought of making a suit of armour.

Here's something you might find interesting. In the film's novelisation, Tony was directly inspired by a story Yinsen told him. 

It involved a prince who was banished and enslaved by a local king. He was forced to work in a mine, deep underground. Years of mining gradually made the prince stronger and stronger, until his skin became as tough as the metal ore that surrounded him. He used his hard-earned strength to escape and kill the king who had enslaved him.