Well, in certain fanfictions, Anakin could die while trying to save someone important. He might sacrifice himself to protect Padmé or Obi - Wan from a powerful Sith Lord or a new, menacing threat that emerges during the Clone Wars. His selfless act in the face of danger results in his death.
In some Clone Wars fanfiction, Anakin Skywalker's death might be caused by a betrayal. Maybe a clone trooper, who has been secretly influenced by the dark side or some hidden enemy, turns on him during a crucial battle. This unexpected turn of events catches Anakin off - guard and ultimately leads to his death.
Some Clone Wars fanfictions might depict Anakin's death as a result of his own inner turmoil. He could be struggling with his growing power and the temptations of the dark side. In a moment of weakness, he might make a fatal mistake, like overestimating his abilities and engaging in a battle he can't win, which leads to his demise.