Perhaps Mace Windu survived and was captured by the Empire. He manages to escape during the events of Star Wars Rebels. He then teams up with the Ghost crew. His presence would be a huge boost to their morale, as he is a powerful and well - respected Jedi. He could also help in the fight against the Inquisitors, using his skills to outwit them.
Yes, there are quite a few. Some focus on Mace Windu's journey after surviving, perhaps seeking revenge on Palpatine or reuniting with the Jedi Order in hiding. For example, in one fanfiction he teams up with other surviving Jedi to undermine the Sith's new regime.
In such fanfiction, it could lead to a completely different power dynamic in the galaxy. Maybe the Jedi would regain their prominence and prevent the rise of the Empire.
He could potentially team up with other Jedi survivors and go on a mission to find and protect Force - sensitive children from the clutches of the Empire. This would be his way of rebuilding the Jedi Order in secret.
Mace Windu was a powerful Jedi Master. He was known for his purple lightsaber and his skills in combat. He was a member of the Jedi Council. He played a significant role in the Clone Wars, leading the Jedi in many battles against the Separatist forces. He was also involved in the discovery of the Sith Lord Palpatine's true identity, which ultimately led to his confrontation with Palpatine in the Chancellor's office.
Well, a common plotline is Mace Windu joining the Rebel Alliance in a covert way. He uses his Jedi skills to help the Rebels without revealing his identity at first. Also, there are stories where he travels the galaxy to find other Force - sensitive beings and forms a new group that opposes the Sith - dominated Empire. These plotlines are popular because they give Mace Windu a chance to be a hero in a different way than he was as a regular Jedi. He has to be more cunning and resourceful in these scenarios.
Well, it could focus on Mace Windu's early days in the Jedi Order. Maybe show how he was trained, his first encounters with the dark side threats, and his rise within the Order.
Another possibility is rogue Jedi who have turned to the dark side. They could be former comrades of Mace Windu, and he has to face them in combat. This would add an emotional layer to the story as he has to fight people he once considered friends and allies.
One of the most memorable moments was when he faced Palpatine. His purple lightsaber clashing with Palpatine's in that intense duel was epic. Another moment was his leadership during battles in the Clone Wars, where he showed great strategic acumen.
If Mace Windu didn't die, he might have trained more Jedi and prevented some of the Order's downfalls. His presence could have altered many events in the galaxy.