Part of me would like to think that Scar would have loved Simba as a nephew if he hadn't taken his place in line for the throne, but then again--Scar' character and emotions were really made against that. Regardless of who was in his way and who wasn't, he only knew what he wanted, IMO, and could care less about the lionesses/cubs/lions in his pride after he overthrew Mufasa.
That's just my viewpoint on it.
That aside, this pic is so cute! You drew Scar really, really well!