Bane was born in a prison and endured a harsh upbringing. He became physically strong and developed a strategic mind to survive and later seek revenge.
The other members of the Bat - family like Robin, Nightwing, and Batgirl are likely to be main characters too. They would be involved in filling the void left by Batman in protecting Gotham.
One idea could be exploring how Batman's allies step up in his absence while he's recovering from a broken back. For example, Robin might take on more responsibilities in protecting Gotham.
I'm not sure about its popularity. It could be popular within a niche group of Sonic fans who are interested in more extreme or non - traditional storylines. However, it might not be as well - known to the general Sonic fanbase as it has a rather specific and somewhat disturbing concept.
Batman's back story is quite tragic. As a kid, he saw his parents get killed. That incident made him vow to clean up Gotham and stop criminals. He spent years learning skills and using his wealth to create his crime-fighting tools and persona.
Cad Bane is a notorious Duros bounty hunter. He was trained in combat and survival skills from a young age. His back story involves growing up in a tough and unforgiving environment that shaped him into the ruthless hunter he became. He has worked for various criminal organizations and individuals, using his wits and extensive weaponry knowledge to track down and capture his targets.
Bane plays a crucial role. He's a powerful adversary who breaks Batman physically and mentally. His presence forces Batman to face his limits and find new ways to overcome challenges.
One great 'Batman and Bane Fanfiction' is 'The Redemption of Bane'. It shows a different side of Bane, exploring his possible path towards redemption. The author does a great job of delving into the complex relationship between Batman and Bane.