I always had a question: are they his cubs or not? I'm sure Nuka is his cub, because he says: "I'm the older, I'm the smartest..." and "Scar wasn't even his father, he just adopted him". Yes, in this film he says so. But in some sites I visited I found that Kovu is his son, and Vitani is Scar's daughter too.
they look just like Scar..