In "Conquest of the Planet of the Apes," set in a dystopian future, apes have been enslaved by humans following a devastating plague that wiped out pets. The story follows Caesar, the intelligent son of Cornelius and Zira, who leads a rebellion against human oppression. After witnessing the brutality towards his fellow apes, Caesar rallies them to rise up. The film explores themes of freedom, resistance, and the consequences of societal oppression, ultimately leading to a violent confrontation that marks the beginning of the apes' rise to power.

The movie that comes after "Conquest of the Planet of the Apes" is "Battle for the Planet of the Apes," released in 1973. It is the fifth installment in the original Planet of the Apes series and continues the story of the apes as they strive to coexist with humans in a post-apocalyptic world. The film explores themes of peace, conflict, and the consequences of war, focusing on Caesar's efforts to lead both species towards a shared future.

In "Conquest of the Planet of the Apes," the famous line that resonates throughout the series is "Take your stinking paws off me, you damned dirty ape!" This line, originally spoken by Charlton Heston's character, George Taylor, in the 1968 film "Planet of the Apes," captures the intense struggle between humans and apes. The phrase has become iconic, symbolizing the series' themes of oppression, rebellion, and the quest for freedom. It highlights the pivotal conflict that drives the narrative across the films.

As of my last knowledge update in October 2023, "Kingdom of the Planet of the Apes" is set to explore new narratives in the franchise, focusing on the evolution of apes. While the film is expected to feature characters and themes tied to the legacy of Caesar, specific details about whether Caesar's son, Cornelius, appears in the film have not been confirmed. The film is anticipated to introduce new characters and storylines, expanding the universe established in previous installments.