One possible storyline could be exploring the immediate aftermath of Bruce's death. How does Terry McGinnis handle the loss? Another could be flashbacks to Bruce's final days, showing his last words of wisdom to Terry.
Bruce Wayne's death in Batman Beyond was a natural consequence of his life's journey. He had been Batman for a very long time, facing all kinds of challenges. His body had been through numerous injuries and his mind had been burdened with the weight of protecting Gotham. Over time, these factors combined with the natural aging process. His heart, which had pumped blood through his battle - worn body for so many years, finally stopped, and he passed away, but his spirit lived on in the new Batman, Terry McGinnis.
Sure was. Batman Beyond was indeed a comic that explored the adventures of a new Batman in a dystopian future. It had unique storylines and art styles that attracted many fans.
Another possibility is that Bruce is making moral decisions in the fanfic that Alfred doesn't agree with. As Alfred has his own set of values and he has been around Bruce for a long time, if Bruce starts to cross certain ethical lines in the name of justice, Alfred would be disappointed.
One reason could be that Bruce Wayne never had the traumatic event that led him to become Batman in the original story. Maybe his parents' death was prevented somehow, so he never felt the need for vengeance and justice in that extreme way.
In terms of Batman's growth, in the harem fanfiction, his personal relationships force him to reevaluate his loner - hero approach. He starts to rely on the members of his harem for emotional support and different kinds of help. This is a big change from the original where he was more self - reliant and solitary in his crime - fighting journey.
Robin, in all his incarnations, is also a popular character in fanfiction related to Batman. He represents the sidekick aspect and the growth and development that comes with it. In Batman Beyond, Commissioner Barbara Gordon also features prominently in some fanfictions. Her connection to the original Batman era and her role in the new one can be explored in interesting ways.
One interesting concept could be exploring alternate universes where Batman has different powers or allies. For example, a fanfiction might imagine a world where Batman has the ability to control shadows like a metahuman. Another concept could be delving deeper into the relationship between the original Batman and the new Batman in Batman Beyond. It could show how the legacy and lessons are passed down, and how the new Batman copes with the huge shoes he has to fill.