Here's my version of Mheetu in my Judas'verse.
He is NOT the son of Sarafina. He was raised by her, and often referred to as her son, but Mheetu actually descended from the Savannah pride, and had been kidnapped as a young cub by a Prideland lion. Sarafina had found him and raised him.
When Scar becomes king, Mheetu is banished from the pride, and ends up returning to the Savannah pride where he is told of his heritage. He takes a mate, has a couple of cubs, and even took in Adwin when the lion needed a home. However, Mheetu had become neglectful of his own cubs in favor of Adwin, and even named Adwin his successor when he decided to step down from power.