I gave Sombra some new armor...just because I wanted to. His old armor was a little peculiar to me, so I used a little artistic freedom.
The scar on his flank is where his cutie mark used to be. I don't think that, once his heart was filled with hatred, his cutie mark would have remained. I think that the removal of a cutie mark would be a shattering, painful thing for any pony, which only added to his hatred.
Season 3= Loved it, would watch it again!