I'm not entirely convinced that's Silver Samurai's look for the film, but I can hardly rule it out either. I'm wondering who that ninja is as well. I can only make out the words 'shadow' and 'ninja' on the box behind him. It's too blurry for me to make out. I don't recognise the guy, but he could just be a basic ninja who is a lackey to Silver Samurai.
Also, does anyone else find it weird that only one of Silver Samurai's kneepads has a face design on it.
Edit: Looks like Samurai's helmet is detachable.