Another plot could involve the return of an ancient evil that was thought to be long gone. This evil could be related to the Old Gods and start corrupting the land and the creatures in it. The heroes would then have to unite all the factions, including the Horde and the Alliance, to fight against this common threat. It could lead to some interesting character development as they put aside their differences.
A young Tauren shaman who has a unique connection to the elements. He could be born with the ability to communicate with a previously unknown elemental spirit. This shaman might lead his people in a new era of peace and harmony with nature.
A plot idea could be that a lemon tree magically appears in Azshara's territory. She believes it to be a gift from the old gods. As she tries to understand its significance, she has to face challenges from her own followers who think it's a bad omen. The lemon's power could be something that can either corrupt or purify, and Azshara has to make a choice.
One idea could be that Riley and Maya are now teachers at their old school. They have to deal with a new generation of students who are facing different but equally challenging problems. It would be interesting to see how they use their own experiences growing up to guide these kids.
One idea could be that Naruto characters are transported to the World of Warcraft universe. They could form alliances with different races like the Night Elves, with Naruto's ability to befriend others coming in handy. Another could be that the chakra system in Naruto somehow interacts with the magic in WoW, creating new and powerful spells.
Perhaps a group of Azeroth's heroes, like the Night Elves or the Dwarves, stumble upon a Halo ring. They have to figure out the technology there while also facing threats from the Covenant. The mages could try to understand the Forerunner magic-like technology, and the warriors would engage in combat with the alien foes.
You could insert yourself as a human knight. Picture this: you are part of the Stormwind army, and you get involved in the fight against the orcs. During a battle, you find a mysterious artifact that gives you special abilities. This leads you on a quest to find out more about the artifact's origin and how it can be used to save humanity from various threats like the Scourge or the demons.
A really interesting plot could be a character who is reborn with memories of a different timeline. They use this knowledge to try and prevent a great disaster that they remember happening in the previous timeline. This would involve complex relationships with other characters who may not believe their warnings at first.
One idea could be time travel in the fanfiction. The main character goes to the future and discovers a world where technology has both saved and endangered humanity. For example, there are flying cars but also a great divide between the rich who can afford advanced healthcare and the poor who can't.
One idea could be that the Hogwarts students are transported to Azeroth. They could learn magic from the Warcraft mages while also sharing their own spells. For example, Hermione might be fascinated by the arcane magic in Warcraft and try to find similarities with her own knowledge of magic. Another plot could involve Voldemort teaming up with an evil force from Warcraft to conquer both worlds. Harry and his friends would then have to gather allies from both universes to stop them.
Perhaps a plot where Future Gohan and Future Trunks accidentally travel to an alternate timeline. There, they have to team up with different versions of themselves to defeat a common enemy. This would involve exploring how they interact with these alternate selves and how they adapt to the new environment and challenges.