There's an easier way of getting people. If you want 20 people taking an additional 200 people and an airliner with them seems overly complex compared to, say, hitting them on the back of the head as they're walking home and bundling them in a van.
The hijacking and stealthily flying it to North Korea are so complex it's beyond ridiculous. There are so many more details which could go wrong and a much bigger international backlash especially from China. And why would they fly back across Malaysia if they wanted to go to North Korea?
On the upside if they are holding a bunch of really smart guys hostage and giving them stuff to build things with then a real Iron Man suit is surely inevitable.