He sure is.
So Grabby went and gak-ed about the new season of MLP to me and everyone else, and in the midst of her gak-ing she showed me a comic someone made that she believed accurately described Sombra's role in the season premier in which the question was asked: "Gak, why you have more screen-time than Sombra?"
So I made this. To better accurately describe his role.
Pinkie Pie, Shining Armor, and Sombra © Hasbro
But I drew it. So there.