A plot could involve the resurrected alien having a form of memory from its previous life. It remembers the humans who defeated it before and targets their descendants. This creates a cycle of revenge and a race for the descendants to find a way to stop the alien once and for all. They might have to search for ancient knowledge or technology to do so.
Perhaps the resurrected alien is not alone this time. It brings back other long - dead aliens from different parts of the galaxy. Each of these aliens has unique abilities and they start to terraform Earth into a planet more suitable for their kind. The remaining humans have to band together, including some with scientific knowledge of the aliens from previous encounters, to fight back and save their planet.
One idea could be that the resurrected alien has some new powers. Maybe it can now blend into its surroundings like a chameleon, which adds a new level of danger. Another could be that the alien forms an alliance with a group of humans who are outcasts from society, and together they try to take over a powerful corporation.
One idea could be Ichigo having to face new and more powerful enemies in his resurrected form. Maybe he discovers new powers that come with this resurrection and has to learn to control them quickly to save his friends.
One idea could be an alien exchange student in a human academic setting. The alien has to adapt to human teaching methods and social norms while also hiding their unique alien abilities. Another could be an academy on an alien planet where different species come to study advanced technologies and inter - species relations are explored.
Perhaps a character who was thought to be dead returns with a new mission and tries to recruit the Young Justice team for a greater cause. This could lead to internal conflicts within the group as they decide whether to trust this new/old ally.
One idea could be that Amanda discovers a way to communicate with the Alien on a basic level. Maybe she uses her engineering skills to create a device that emits frequencies the Alien can understand. Another could be that Amanda and the Alien form an unlikely alliance against a common enemy, like a group of rogue Weyland - Yutani employees who have their own malicious plans for the Alien.
One interesting plot idea could be that Reiri and Riza have to team up to save the princess from a powerful dark force. They might face various challenges along the way, like difficult magical barriers or dangerous monsters. Another idea is that there's a misunderstanding between them at first, but as they work together, they come to understand and respect each other more. Maybe they also discover a hidden power within themselves or a long - lost secret about the princess that helps in their quest.
One idea could be that an alien vampire infiltrates Ben's team. It pretends to be a friendly alien at first but then starts to slowly drain the energy of the other aliens. Ben has to figure out a way to expose it without endangering his friends.
One idea could be that Naruto discovers his alien mother left him with special powers that are not from the ninja world. For example, he might have the ability to manipulate energy in ways unseen in the Hidden Leaf Village. Another plot could involve Naruto's search for his mother's home planet, leading him on an intergalactic adventure where he meets all kinds of alien species and has to use his ninja skills in new and unexpected ways.
One idea could be an alien race coming to Kuoh Academy with unique powers that the devils, angels and fallen angels have to deal with. For example, an alien race that can manipulate time, causing chaos in battles and daily life.
One idea could be a young human who gets caught in the middle of an alien - predator conflict and has to use their wits to survive. Maybe they form an unexpected alliance with a lone predator who sees potential in the human. Another plot could be an alien - predator hybrid created by some mad scientist, and the two species have to team up to stop this new threat that is stronger and more unpredictable than either of them.
One idea could be that the aliens target the Dust in Remnant as a powerful energy source. The RWBY team has to figure out how to protect it while also learning about the aliens' technology to fight back.