[quote="Zirafan12"]But why did she turn into such a devil lioness? I think Scar groomed her to become his heir and darkened her heart..
but it makes so much sense. This would also make Nuka, Vitani and Kovu Scar's grandchildren. Vitani has Scar's dark fur around her eyes, even Zira doesn't have that feature, Kovu has his grandfather's eyes and dark fur, but Vitani inherited her 'head tuft' from grandma Uru, Zira also inherits her grandma Uru's stripe. (We have no idea what Scar and Mufasa's mother looked like.) Vitani also gets her blue eyes from Uru, or possibly a recessive gene.[/quote]
This does not make sense, and even outright contradicts the context of the movie. Zira herself states Kovu is Scar's hand-chosen successor. Zira's reasons for her evilness is clearly detailed that she believes Simba unrightfully killed Scar, and seeks to restore his natural order with Kovu on the throne ("I can now see the path to our glorious return to power..."). Also, Zira refers to Scar only by his name, and never refers to him as her father. Kovu mentions Scar as being somewhat of an adoptive father, not as a grandfather. The same should apply to Vitani and Nuka.
As for the genetics argument, you have to remind yourself that they are animated characters. The characters look the way they look is because of the filmmakers' artistic decisions. These characters don't have a DNA genetic chain we can study from to judge the dominant and recessive traits. Second, Uru is a non-canon character whose existence in the
Six New Adventures books was denied by the first film's filmmakers on the audio commentary when they named Simba and Nala's cub "Fluffy" not Kopa, the books' main character. When they denied Kopa from existing in the first film, they indirectly denied all the content he appeared in from existing in the films.
Not to mention, you contradicted your own argument by stating no one knows what Mufasa and Scar's mother looks like, but you automatically assume she has blue eyes, a stripe, and a head tuft.
[quote="Zirafan12"]I also think that Zira is the reason for Sarabi's 'absence' in SP. After seeing Scar get ripped to shreds by his hyena pals, she became bloodthirsty and vengeful, she killed Sarabi when she was alone, or taking a night stroll. Simba loses his only parent and exiles her and her 'Pride' to the outlands.
This would also explain Simba's personality change, not only did he lose his father, but his mother as well.[/quote]
Hasn't Simba been through enough? He just learned Scar killed his father, and has a tremendous amount of power and responsibility at his disposal. Sarabi's death is not necessary for Simba to grow increasingly protective over Kiara or have a sudden mistrust of non-Pride Landers. First off, it was never mentioned that Sarabi was murdered by Zira, and a detail like that to an important character's mother is impossible to gloss over. Since it's never mentioned, it most likely never happened. Second, Simba only has a nightmare of his father's gruesome death, and if Sarabi was murdered, it would have been included given the event is more recent in times to the events of the sequel. Since this never occurs, Mufasa's death and the anger he has over Scar because of it is indeed the main fuel behind Simba's mistrust of anything associated to Scar including his chosen heir and the pride that raised him.
I also think that Zira is the reason for Sarabi's 'absence' in SP. After seeing Scar get ripped to shreds by his hyena pals, she became bloodthirsty and vengeful, she killed Sarabi when she was alone, or taking a night stroll. Simba loses his only parent and exiles her and her 'Pride' to the outlands. 
