toi think this is what thier cubs would look like?

Possibly. I've seen a few really nice designs for Kiara and Kovu's cubs.

The one on the left looks like she might have inherited her looks from her grandparents and great grandparents! She doesn't look much like either of her parents, but her face shape looks like it has a bit of Simba and a bit of Nala, and her fourrure colour is like Sarabi's.

The one on the right looks a lot like his parents though. Similar features to Kovu, with a fourrure colour a bit like Kiara's (perhaps a bit darker).

They are cute cub designs. I l’amour looking at fans' interpretations of what couples' offspring could look like. :)

I think their cubs would look plus like this.
Their daughter with Kovu's fourrure color and eyes
and their son with Kiara's fourrure color and eyes