...anyone realize they ALL are old and not even showing it. I mean the adults of the first film.
THE APPROXIMATE GENERAL TIMELINE: is 10 years.
I assume Kovu is about a year older than Kiara, judging by his cubhood's head tuft being the mane starting to grow. And that the adult Kiara is at least four because adult Kovu has to be at least five years old, judging by his mane being fully grown. Resulting in the two movies going through at least ten years in time: 5+ years of Simba before he claims the throne, then about a year for the Pride Land to recover and Kiara be made and born, and then the about four growing up years.
A LION'S ELDERLY AGE STARTS FROM 10 years of age, as in they start to grow weaker and grayer.
RAFIKI:
Add the ten years to Rafiki's already old age in the beginning of TLK... How old CAN the whatever baboon Rafiki is, live? Or maybe he's just taken reeeally good care of himself. There are stuff in nature that can heal and keep you in a good shape and Rafiki is the shaman character.
SCAR:
He had to be at least five going on six in the beginning and almost a year older when he exiled Simba as in at least six going on seven. He had to be at least 11, likely 12 or older in the end of TLK. He wasn't even graying though should've been. And he fought like a young lion.
TIMON AND PUMBAA:
They were adults when Simba was less than a year old, so they too should be quite old by the SP movie's events. But no aging apparent at all.
SIMBA AND NALA:
Simba was at least five years old at the end of TLK, judging by his mane and the fact that his father chose this time to have Simba challenge Scar. Add five years between his return and Kiara and Kovu's wedding, Simba would be stepping into his old age by the end of the film yet he seemed as young as ever. Same with Nala.
ZIRA (wasn't in the first film but I talk about her anyway):
I'd finally assume she was couple of years older than Simba and origins from Mufasa's pride. That would make her about eight years old in the end of TLK and 13 in the end of SP. Again, no aging shows. But wherever she comes from, she had to be at least 12 years old when Kovu and Kiara were grown up because lionessess can't have babies before the age of four and Nuka seemd around the age of 2+ in the beginning of the film.
SARABI:
I've thrown a theory about her old age for the reason she isn't in the SP film but I doubt the film makers actually thought of it.
BECAUSE:
Apparently they, (both film's makers), went for the cartoon characters' right not to age at all or age unrealistically. But nonetheless the old age would explain Sarabi's absence if thought of realistically and not cartoonily and it never hurts thinking realistically when trying to fill plot holes.