My take(once more) on the matter
This isn't as fierce a debate as many other theories in the TLK fandom, but it does irritate me somewhat when I see people make Ahadi Mohatu's child. This is my take on the matter...
Not that it conflicts with my theories, but their reasons are poor. So far i've heard:
All Lion Kings have been male
Ahadi is reffered to as The Lion King, so he is royal born
Ahadi teaches the Royal sons, so he must be heir
Mufasa heard about the great king's from his father, so Ahadi was royalty
All these reasons can be easily countered.
All Male Rulers
This is a blatant lie. KIARA is a female, and she's more canon than Kopa. Also, how does anyone know Mohatu HIMSELF isn't a consort? Yes, I believe he was the royal king, but it looks to me like you all are assuming since his queen is never mention HE is the royal son of the one of the three daughters. How do you know his queen isn't royalty? You don't, so at least give it some thought before jumping to conclusions.
"The Lion King"
Personally, I don't count this term "The Lion King" as canon. Sure, it's used in 6NA and various TLK AND SP books, but is it ever said once in the movie?
In the movie, the ruler is referred to as "King" or "Queen". No "The Lion" comes before it. And even IF that's his title, most of us believe Ahadi and Uru had a pretty steady relationship. I've seen deviants deviate away from canon(doesn't conflict with the movie so it's alright) but i prefer to stick to it: Ahadi WAS the King. Perhaps Uru let him be the king instead of a simple consort she needed for cubs? This would indicate a good relationship between the two, don't you think? Also he appoints Zuzu as his advisor and Uru doesn't seem bothered by this as Zazu is Mufasa's advisor.
Or perhaps she was. Maybe she came back, scolded Ahadi, told Zuzu and her son to GTFO. It would tie "Friends in Need" and "A Tale of Two brothers" nicely.
Ahadi taught his sons
Ahadi only taught Mufasa. This is said straight out on the back of the book, that he taught Mufasa for hours. There is no past tense here. The books simply says "So Ahadi spent hours with him, teaching him with him what he needed to know" not he HAD been teaching him so the lessons could be fairly early. Uru was gone, so obviously she couldn't do anything, thus the task was left up to Ahadi.
Thing is, Ahadi doesn't teach either of his sons anything. In fact he was being taught himself by Rafiki.
It makes since as a male, Ahadi would've taught Mufasa how to fight and defend and that Mufasa would probably want to spend more time with him than his mother doing 'girl stuff'(even Kopa comments on this in 6NA).
So, Mufasa's line about being taught about the great cirle of life? Well Kiara taught Kovu. Uru could've taught Ahadi, and considering Ahadi was teaching Mufasa, why WOULDN'T Ahadi tell Mufasa?
That's a nice argument, but easily curved to make Uru still the heir with support directly from the canon SP.
Now for the things SUPPORTING Uru's Royal parentage
Uru's fur color
Is dark. No matter which version of Ahadi you believe, her fur has to dark like he son Taka's. How do I know? Well, in the book Ahadi and Mufasa sit side by side in one picture and Ahadi is 2 or 3 shades darker than his son. We already know Mufasa is an orangey gold so one could conclude Ahadi is a dusky gold.
Which means Uru is dark. Mohatu's fur is dark, a few shades darker than Scar's. http://images.wikia.com/lionking/images/b/b7/Mohatu_onrock.png http://images.wikia.com/lionking/images/2/26/16724.jpg
Many excuses I've see when I present this information is "Well Mohatu's queen could've had golden fur, green eyes, and a black tail tuft!"
Further support my argument. Either way you go, Ahadi looks NOTHING like Mohatu. Ahadi has a red or/and black mane. Mohatu has neither, and anyone who knows me knows I don't believe certain traits can be inherited from grandparents due to the simple fact it's NEVER shown to happen in the TLK universe.
Also, lioness are only shown with brown tail tufts, this never changes ever anywhere, so Uru's couldn't have been black.
Scar's Bad Genes
Scar comments he has bad genes('But i'm afraid i'm on the shallow end of the gene pool' http://www.mylionking.com/w/images/a/ac/The_Lion_King_%28comic%29_05.jpg ) So one of his parents had to have poor genes and have passed it to him.
Ahadi wasn't this lion, as you can clearly see in the book he was fit and strong, and the text doesn't conflict with this.
Then there's the simple fact weaklings weren't allowed on the throne. (Scar is ignored for Mufasa, and Nuka is ignored for Kovu).
So it had to be Uru.
A terrible drought occurs during Mohatu's days as king, and the lack of food and water for himself let alone the pride and the queen, could've made Uru a runt. Mohatu lived a long time, the longest of any king, as said by the book, perhaps TWO droughts could've hit and this caused him to die and made recovery for Uru impossible.
Mufasa's stark difference to the Pride
Mufasa is the only lion in his pride with golden fur. Everyone else is cream, beige, tan or brown. Further supports Uru being the heir.
Lionesses tend to resemble their queen in TLK movies. In the first one, alot of them looked like Sarabi and in the second one, alot of them looked like Nala and Kiara(who'd be the future queen). In the outlands, many of the lionesses resemble Zira or Vitani.
We've established Uru has brown fur, so the golden fur comes from Ahadi and since Mufasa is the only one in the pride with this fur, it's safe to say Ahadi was the consort, not a royal king. What throws many people off is Scar's outsider genes, which makes everyone believe Uru was the wanderer.
Well, no outsiders were a part of the pride during Mohatu's reign, or Ahadi's reign(besides Ahadi himself, possibly), or Mufasa's reign(never seen or mentioned, thouh some books call them rebels...), so they had to be part of Scar's reign and exiled in Simba's.
That being said, Mohatu's mate was pridelander, like he himself was as lions really don't marry outside their pride.(Mufasa and Sarabi were betrothed, Nala and Simba were betrothed, Simba is reluctant in letting Kovu get with Kiara due to the 'Tradition going back generations'.)
Uru searches for the water
Not Ahadi. Ahadi simply stays to calm the animals and probably teach in his mates place since Uru leaves. Neither Mufasa or Scar have much of a relationship with their father, so it's safe to say Uru, as the Royal Queen, taught her sons similar to how Simba taught his daughter.
Uru leaves to find water, just like Mohatu does. I'm telling you, their similarities are UNCANNY.
One of the main reasons I support this theory: It's good to have some royal females over males yeah? I get tired of seeing the same thing over and over.
Conclusion: Uru was a runt, born to Mohatu, the king, and she made Ahadi her king and produced two cubs with him: A stud(Mufasa) and a runt like herself(Taka. This could run in the family, or at least Taka's side. Just look at Nuka.). Uru knows the land better than Ahadi and leaves to find water, passing the teaching duties to Ahadi since they are young males who need their father's male teaching and she couldn't do it herself because she was gone.