Little Bear's Adventures of The Lion King II: Simba's Pride is and upcoming Little Bear/Disney crossover to be made by Hiatt Grey. And is the sequel Little Bear's Adventures of The Lion King.
In the Pride Lands of Africa, King Simba and Queen Nala's newborn daughter, Kiara, is presented to the assembled animals by Rafiki, a mandrill who serves as shaman and advisor. Young Kiara becomes annoyed with her father's overprotective parenting. Simba assigns Timon and Pumbaa, a meerkat and warthog, to follow her. Kiara ignores her father's warning and the duo's attention and enters the "Outlands," where she meets Kovu, a cub who was chosen by Simba's uncle Scar to be his heir and they escape from crocodiles. When Kovu retaliates to Kiara's playing, Simba confronts the young cub just as Kovu's mother Zira confronts him. Zira reminds Simba of how he exiled her and the other Outsiders, and she reveals that she selected Kovu to be Scar's successor.
After returning to the Pride Lands, Simba sends Nala and the rest of the pride back to Pride Rock while he lectures Kiara about the danger posed by the Outsiders. Simba then tells her that they are a part of each other. In the Outlands, Zira reminds Kovu that Simba killed Scar and exiled the lions who respect him. Kovu explains that he does not think it is so bad to have Kiara as his good friend, but Zira realizes she can use Kovu's friendship with Kiara to seek revenge on Simba.
Several years later, Kiara, now a young adult, begins her first solo hunt. Simba has Timon and Pumbaa follow her in secret, causing her to hunt away from the Pride Lands. As part of Zira's plan, Kovu's siblings Nuka and Vitani trap Kiara in a fire, allowing Kovu to rescue her. Unable to thank the young rogue, Simba is forced to accept Kovu's place since Kovu rescued Kiara. Later that night, Simba has a nightmare about attempting to save Mufasa from falling into the wildebeest stampede but is stopped by Scar who then morphs into Kovu and sends Simba to his death.
The next day, Kovu contemplates attacking Simba as he was instructed to, but he teaches Kiara how to hunt instead and eventually realizes his feelings for her. Later, Kiara and Kovu stargaze where they talk about the Great Kings of the Past and Kovu wonders if there is a darkness in him like there was in Scar. Simba watches the two from afar and Nala convinces him to give Kovu a chance. Kovu attempts to reveal his mission to Kiara, but Rafiki interrupts and leads them to the jungle, where he introduces them to "upendi" (an erroneous form of upendo, which means "love" in Swahili). The two lions fall in love. That night, Simba allows Kovu to sleep inside Pride Rock with the rest of the pride, but Vitani tells Zira about Kovu's failure to kill Simba. Zira sets a trap for her son and Simba.
The next day, Kovu wants to reveal his mission to Kiara, but Simba takes him around the Pride Lands and tells him the real story of Scar. The Outsiders attack Simba and Kovu attempts to intervene, but Vitani injures him. Nuka attempts to kill Simba, but Simba escapes and Nuka is killed. Zira scratches Kovu for his brother's death, causing him to turn on her. Kovu returns to Pride Rock to plead Simba for his forgiveness but is exiled. Kiara makes Simba realize that he is acting irrationally, and flees to find Kovu. The two lions later find each other and profess their love. Realizing that they must reunite the Outsiders and Pridelanders, Kiara and Kovu return to the Pride Lands, where they convince them to stop fighting. Kiara shoves Zira over a cliff to rescue Simba, but despite Kiara's offer to be rescued, Zira falls to her death.
In the aftermath, Simba accepts the Outsiders back into the Pride Lands and appoints Kovu and Kiara as his successors.