Wait...when did that happen? I only read the older comics from the 80's....I remember Storm Shadow being brought back to life by Dr. Mindbender when Serpentor was created....when did Snake Eyes die? Is that in the new IDW comic?
He dies in issue 7 of America's Elite, confirmed dead in issue 8... the red ninjas revive him a few issues later as their slave. I think of it as Zombie Snake Eyes. Storm somehow manages to get him back to himself by letting him stab him... never quite understood that part, or tried too hard to. Because... well, zombie Snake Eyes.