If the Iron Man film was a cartoon, set in China and not as good, then it would be pretty close to this.
For a part it follows a very similar plot line, indeed even some scenes are pretty close to the movie, I'm going to hazard a guess that they're common across the origin story variations in the comics too. But then there's this whole other super natural thing with a Chinese Mandarin and his elemental warriors, wait, that's it!...
If the Iron Man film, was a cartoon, set in China, not as good and basically Iron Man meets Big Trouble in Little China, then it would be pretty close to this. (Although Big Trouble.. is better ;)
I'm guessing seeing the movie before this didn't help, but then I've only watched this because of seeing the movie and I probably won't go out of my way to watch any more Iron Man stuff until Iron Man 2.
If you're into Iron Man, then it's probably worth a watch, casual viewers, maybe not so much.
The Invincible Iron Man - 5/10