It sounds pretty cool but...
The idea sounds pretty cool, but you should probably invest in a better animator if you want anybody to take you seriously. No offense, but your guys look pretty... well... bad.
The story seems pretty well thought out, but there are a few minor details you might want to change (ie the specs of the diamond soldier suit) to keep the story from jumping the shark. Its kind of hard to take a story seriously when you have an android piloted by a captured soul shooting ice and fire out of his hands.
I'd even recommend changing the "captured soul" thing if it weren't a crucial part of the story. Like, if its a changeable detail, you might want to make it a mortally wounded soldier's soul or something.
All and all, it seems like a pretty solid idea, there are just a few details you might want to change to make it at least somewhat believable.
Good luck!