Dragon Ball Z is not based on real events. It's a creation of the author's imagination, presenting a unique and exciting fictional universe filled with characters and adventures that exist only in the realm of fiction.
Dragon Ball Z is both anime and manga. The anime was adapted from the manga and they share the same story and characters, but presented in different mediums.
The story length of Dragon Ball Z: Kakarot varies depending on how much side content and exploration you do. But on average, it can take around 30 to 40 hours to complete the main storyline.
Overall, the story of Dragon Ball Z: Kakarot is lengthy and immersive. It takes you through many key moments and battles from the series. The gameplay and cutscenes combine to offer a comprehensive experience.
The length of the story in Dragon Ball Z Kakarot is substantial. It includes a lot of main quests and numerous side missions, which could add up to tens of hours of gameplay if you aim to complete everything thoroughly.
Sorry to disappoint you. The Dragon Ball Z manga is not ongoing. It had its own definitive ending, but its popularity continues through various forms of media and merchandise.