I have recently got some awesome ideas, so here I go!

The cave lion
These lions are very large, about the size of a primal male, whether it be male or female. They are very rare and require a new item to give you a higher chance of it. Cave stone, which will cause a lioness to give birth to a primal, and, on a small chance, it will also be a cave lion. Within 5 days the cub will die if it has not been given the cave pebble, which gives them life.

Snow leopons
Leopons, but they are much furrier and look a lot like snow leopards

Panther
Panthers are an extremely rare mutation which can be received like leopons.

Hairless tails
This mutation can be as common as tailless and bobbed. It removes the hair tufts on a lion or lioness and give them instead a leopard like tail.

Mangy
Mangy lions will have pieces of hair missing from them. In order to fix it if you don not want it, you need to buy “Hairy fruit” items from the oasis to make an concoction in order to feed to your cub to get the mange to go away. Once the cub is weaned, the concoction will only have a chance to cure it, and once it’s an adolescent, it will no longer be able to used.

That’s all I got rn but i kinda like these.