Well, Superman's strength and invulnerability would be a great match against the brute force of some of the larger Warhammer creatures like Ogres or even some of the daemons. His heat vision could also be a useful weapon against hordes of enemies. Batman's strategic mind would be invaluable in dealing with the complex politics and power struggles in the Warhammer universe. He could also use his gadgets to adapt to the different technologies and magics there. Wonder Woman's combat skills and her Lasso of Truth could be used to great effect in dealing with the more devious characters in Warhammer, like the Dark Elves.
One exciting plot twist could be that the Chaos forces from Warhammer somehow corrupt a member of the Justice League. Imagine Superman, under the influence of Chaos, turning against his comrades. It would create a huge internal conflict within the League as they struggle to save him without harming him. Another could be that the technology or magic from Warhammer is introduced to the DC Universe in a way that changes the power dynamics. For example, the Warp magic could give new abilities to some of the villains, forcing the Justice League to adapt quickly.
Well, one big challenge is getting the lore right. Warhammer has a ton of detailed lore, and Young Justice also has its own established universe. Combining them without messing up the facts is tough.
Teamwork is another big theme. In these crossovers, the Justice League has to learn to cooperate with new characters. They often start off with some misunderstandings, but then they come together to face a greater threat. It's all about how different heroes can combine their skills for a common good. In many fanfics, there's also a theme of exploring new worlds. When the Justice League crosses over, they get to see different universes, cultures, and ways of doing things in the other team's world.
Another possibility is a more comical crossover. The Flash tries to race a Warthog from Halo and fails miserably because he doesn't understand the vehicle's controls. Or Batman trying to figure out the technology of Halo's weapons and getting all confused. This kind of fanfic would be full of humorous moments and cultural clashes between the two universes.
Sure. A lot of these crossovers play around with the different power levels and moralities. For example, a story could involve a Warhammer chaos warrior somehow ending up in the Young Justice world and causing chaos (no pun intended). It's all about how the authors blend the two very different universes together in an interesting way.
One way it could work is by having a threat that requires both the Hulk's strength and the Justice League's diverse powers. For instance, an alien invasion that has technology to nullify the League's powers partially. The Hulk's physical strength would be unaffected, so he could be the key to victory.
Well, in this fanfic, the Hulk could bring a new dynamic to the Justice League. His lack of restraint might force the League to adapt their strategies. For example, Batman would have to figure out how to control Hulk's rage. And Wonder Woman might find herself in a position where she has to protect Hulk from his own self - destructive tendencies while also using his power to their advantage. It could be a story full of conflict and cooperation.
In a Justice League Avengers crossover fanfic, there could be epic battles. For example, Superman and Thor might have a showdown to test their super strength. They could exchange powerful blows while the other heroes watch in awe.
Character development is key. If you're writing a fanfic about this crossover, you need to make sure the characters from both universes stay true to their original personalities while also evolving in the new situation. For instance, Wonder Woman should still be strong - willed and brave when she meets the Arbiter from Halo.