Here's an amazing piece of fan art for The Iron Giant created by Jordan Kotzebue for the classic animated film's 10-year anniversary. This shows us his vision for a sequel, and this is the idea behind it…
I wanted to do a piece of what I would have liked to see in a sequel. Ten years after the events of the first movie, the Giant finally puts himself back together again. When he goes searching for Hogarth, he finds out Hogarth is in Vietnam. All the while an invasion is approaching, with some familiar looking machines. It is discovered that the Giant was just a scout!
Iron Giant is one of my favorite animated films of all time, and I would love to see a sequel like this happen. I know it never will, but it's still a really good idea!