All over the online fandom they say that Simba's Pride's makers were originally writing with two cubs, Chaka and Shani (Kiara's early name), but cut Chaka out and continued only with the girl. But the only part of that story I can find official support for, is the name Shani.
Someone has said that on the 2-disc special edition DVD there's concept art with Chaka labeled on it but another one says they've never seen such but only the concept are of Shani. I don't have that DVD release yet so I can't check it out.
Are people trusting the Unofficial TLK Character Encyclopedia at The Lion King WWW Archive? It mentions Chaka. But even that page does not say anything about Chaka being a brother to anyone. And hence the word unofficial, and it doesn't even state its exact source.
Because of all this, I have to believe that apart from the name Shani, all of this is just another case of a rumour widely accepted as truth with no facts to back it up.
Can someone help solving this confusing issue?