Well, in certain fanfictions, his death could be a result of a villain's elaborate plan. The villain might have found a way to disrupt the speed force that powers Wally. They could have created a device that nullifies his powers temporarily, and then, while he was vulnerable, dealt a fatal blow. This would be a tragic turn of events, especially for his friends in Young Justice who rely on him.
The emotional impact would be far - reaching. For the Young Justice team, it would be like losing a part of their family. There would be a lot of guilt, not just from Artemis but from others who might think they could have helped. His death could also lead to a change in the team dynamics. They might become more cautious, or some members could become more reckless in their attempts to avenge him. It would be a very difficult time for everyone involved in the Young Justice universe in the fanfiction.
Wally could be developed by showing his growth in character. For example, if he was a bit cocky before, he could return more humble and with a deeper understanding of the world. This change could be a result of his experiences while he was away.
Well, I really like the fanfic 'Wally West: Racing Against Time'. It's a thrilling read as it pits Wally against a new and powerful enemy that can manipulate time, which creates a whole new set of challenges for him. Then there's 'Wally West and the Lost Speed Force'. This one is more of an emotional journey as Wally tries to find his connection to the speed force again. And don't forget 'Wally West's Allies and Adversaries' which gives great insights into the characters he interacts with.
Wally West's speed in the comics is off the charts. He can move at velocities that surpass the limits of normal comprehension. His powers allow him to zip around and perform feats that seem impossible to others.
In certain comic book runs, a black Wally West has made appearances. This character variant has added diversity and new story possibilities to the comics.