Well I don't have any story for TLK universe and I am not really into making one but if I do this is what going to happened.

After he was bitten by a Cobra. he became blind. because Snake's bite are much powerful to give a simple scar. and some of them will kill everyone immediantly and if anyone survives they will get blind. exactly like The NUN movie.
If I had a story I would explain it in this way like Kion was bitten by Cobra and his parents left him to die in the desert because they know the affects of the bite. and only his close friends were left for him. he killed them immediantly when hatred took over his heart. but hopefully he survives and he met Nuka. the only lion that everyone thought he is dead. but he survived as well as him. but he got many scars on his body because of sticks. and they made a team and found 2 other ungrateful cubs Kopa and Mheetu and they all made a pride to get revenge. Nuka wants to kill his brother Kovu to become a king. Now Kion wants to destroy Kiara and take the kingdom. Mheetu and Kopa want to kill Simba because of his cruelness over them.

I will paint Kopa and Mheetu later ^^
Now I have exam to study XD

Mheetu, Kion, Kopa and Nuka © Disney
Art © ME

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Commission info:
https://www.furaffinity.net/view/45300771/