Question for my readers

Okay I'm nearing the beginning of my fifth chapter in my new story so I will begin publishing it in the next few weeks. I do have one loose end that I need to tie up. An ancillary villain, Sombra would work for this. Now in my opinion Sombra was an essence of his former self, not a physical creature, think Sauran. I also think he was killed off. However for the story he would be a good character to play with and would be a natural fit, but the story takes place post Sombra death.

As the readers how do you feel about including him and what are your opinions on his capabilities?