A big theme is the idea of using past experiences for the present and future. Since he's a war vet, he has unique skills and knowledge. In time travel, he uses these to better the situations he encounters. Also, there's often the theme of self - discovery. Traveling through time makes him see himself in different lights, like how his identity as Spiderman and a war vet interact.
One common theme is redemption. The war vet Spiderman may have done things in war that he regrets, and time travel gives him a chance to fix things or make amends. Another theme is the clash of values. Different eras have different values, and as he travels through time, he has to reconcile his modern - day values with those of the past.
One great war vet Spiderman time travel fanfic is 'Spiderman: Through the Wars of Time'. It has an amazing plot where Peter Parker, as a war vet, gets sent back in time during a battle. The author does a great job of showing how his combat skills and Spiderman abilities interact in different historical settings.
A war vet can be incorporated as a mentor figure. He could teach Spider - Man some combat techniques he learned in the military. For example, hand - to - hand combat moves that are different from what Spider - Man already knows, which would make him more effective in close - quarter battles.
One interesting plot could be a war vet who, after coming back from war, finds solace in the adventures of Spider - Man. He starts to see parallels between his own battles and the ones Spider - Man faces in New York. Maybe he even imagines himself having Spider - Man's powers to deal with the PTSD and the challenges of readjusting to civilian life.
One common theme is the exploration of Spider Man's dual identity. Fanfictions often focus on how Peter Parker manages to balance his normal life with his superhero responsibilities. Another theme is the relationships he has, whether it's with his love interests like Mary Jane or his friends and family.
One common theme is the idea of changing history. Many fanfictions explore what would happen if a time traveler could alter the outcome of a battle or a political decision during the revolutionary war. Another theme is the culture shock. A modern - day character traveling back has to deal with the different social norms, language, and way of life. For example, the role of women was very different back then.
One common theme is heroism. They often talk about brave acts of their comrades or themselves.
One common theme is the harsh environment. The cold in Korea was a big challenge for the vets. Another is the bond among soldiers. They had to rely on each other. Also, the experience of combat and the fear that came with it.
If Spider - Man travels back in time, it could strengthen his relationship with Uncle Ben. He might get a chance to really talk to him and understand his values better, which would in turn make him a better hero in his own time. Also, his relationships with his friends like Ned and MJ could be affected. For example, if he changes something in the past, he might come back to a different present where their relationships have shifted.
One common theme is redemption. Since Naruto is a war veteran, he often tries to redeem the mistakes or tragedies that happened in the past. He wants to save his friends and the village from the pain they endured in the original timeline.
A common theme is deception. Since the Chameleon can change his appearance, there's always a sense of not knowing who to trust. Another theme is the battle of wits. Spider Man has to outsmart the Chameleon who is very sly. For instance, in many fanfictions, Spider Man has to figure out the Chameleon's true identity among a crowd of people.