All those Ironman pictures below to say...
That this whole thing started because I had this image in my mind.
Samus emerging from her powered suit!!!
This latest image is rather crude... for I was using very loose pencil and brush strokes...
Anyways, so, I was imagining how the suit would work. And then, the whole Ironman thingy-ma-bob came up. So, I designed Ironman's suit in a similar fashion. But, I must say, I am more pleased with Samus' suit much much more.
Like I said before, I didnt' want a body suit. So, i had to design exo-skeleton powered suit. But, in order to retain her crazy proportion (check out her latissimus dorsi on all her official art as well as 3d models), I had to make the suit much bigger than how it is depicted in the game.
Also, for this particular image, I tried to keep the desgin of Samus to be more closer to the one from Metroid Zero Mission. But, the design of the suit is still the one I did (very first image from my deviant gallery).