The fact of the matter is He fills one of the roles we hope to see filled later on when you know who comes back. It finally adds a villian that is acually "EVIL" not saying chryisalis wasn't evil She had her own purposes for being evil hive to feed and all that . Sombra was evil to be evil he was like the demon in pony form when it comes to evil. And hopefully he will make a return in bigger and better manner. As for his role in this episode. It was lacking. A few lines would of changed the entire show.