Well, it's hard to give an exact number of hours. But typically, to complete the core story of Arkham Asylum without getting too bogged down in extras, you could expect it to take around 10 to 15 hours.
To create a believable character arc for Killer Croc, start with his backstory. Show his early life and how he became the way he is. Maybe he was once an ordinary person who was experimented on. Then, as the story progresses, have him face challenges that force him to change. For example, if he meets a group that accepts him, he might start to become more trusting. By the end, he could be on his way to becoming a more heroic figure, or at least less of a feared outcast.
In this fanfiction, Naruto could be a patient in Arkham Asylum. He has lost his memory and believes he is in some strange version of Konoha. The doctors at the asylum are trying to understand his 'delusions' about ninjas and chakra. Meanwhile, some of the more evil inmates sense his power and try to manipulate him for their own gain.
Overall, the Arkham Asylum game is fairly faithful to the comic. It features familiar characters and settings, but there are some gameplay-driven tweaks and additions to enhance the interactive experience.
Killer Croc was born Waylon Jones with a rare skin condition that made him look reptilian. He was bullied and ostracized, leading him to a life of crime.
One of the main themes is the nature of insanity. It explores how the inmates of Arkham Asylum, with their various forms of madness, interact with each other and the world around them. Another theme is the thin line between good and evil. Batman, who represents justice, has to deal with the chaos and moral ambiguity within the asylum. Also, the power dynamics within the asylum, between the inmates and the staff, are explored, showing how control and lack of it can affect the overall environment.
One idea could be that Naruto is somehow transported to Arkham Asylum. He might initially be confused by the strange new world, but his ninja skills could come in handy. For example, he could use his speed and agility to avoid the traps and villains in the asylum. Maybe he teams up with Batman, who is intrigued by Naruto's unique abilities.