He could be injured in a magical experiment. For example, if he was trying to create a new spell with his friends in a secret place, and something went wrong. The spell could backfire and cause him an internal injury. His friends would then be faced with the dilemma of whether to tell the teachers or try to fix it themselves.
There could be a situation where Albus Potter is injured in a magical accident at Hogwarts. Maybe there was a malfunction in one of the magical devices in the school. He gets caught in the blast and suffers multiple injuries. His classmates would come together to support him, and some might even discover new magical abilities or talents while trying to help him get better.
In a fanfiction, Albus Potter might get injured while on a mission to retrieve a powerful magical artifact. He could be ambushed by dark wizards who want the artifact for themselves. They use dark magic to harm him, like a curse that makes his body gradually weaken. His recovery would then be a long and arduous process, with him having to learn to use his magic in new ways to fight off the curse.
In such a fanfiction, Albus Potter might initially be intimidated by Snape's reputation. But he could gradually discover Snape's hidden qualities. Maybe Snape would become a mentor - like figure to Albus, guiding him in magic that he couldn't learn from others.
The fanfiction could show Albus Potter learning about the Marauders' values and how they formed their strong bond. He might be in a situation where he needs to form his own group of friends like the Marauders did. The Marauders could also help Albus deal with the pressure of being a Potter. For example, they could tell him how James Potter coped with all the attention he got, and this would give Albus some perspective on his own situation at Hogwarts.
One possible fanfiction could be that Albus Potter gets injured during a Quidditch match. Maybe he's hit by a Bludger that was jinxed by a rival team member. His friends then have to rush him to the hospital wing, where he has to recover while worrying about missing important school events.
In this fanfiction, Albus Severus Potter might be scolded severely in the howler. Maybe he got into some big trouble at Hogwarts, like getting caught cheating in a very important exam or accidentally releasing a dangerous magical creature in the school. The howler could be from his parents, especially if they found out about his misdeeds and were extremely disappointed.
Perhaps Snape could help Albus Severus come to terms with his family legacy. Albus Severus is named after two great wizards, Albus Dumbledore and Severus Snape. Snape could share his own experiences of being in the shadow of great names and how to carve out one's own identity in the wizarding world. This encounter could be a very emotional and character - building moment for Albus Severus.
Well, Albus could finally understand Snape's true nature. Maybe he discovers the sacrifices Snape made for his family. He might apologize for any wrong assumptions he had about Snape in the past.
He could discover a hidden spell that was long forgotten. This spell might be related to the very foundation of Hogwarts. Albus, being curious, would then try to understand its origin and purpose.
Maybe Albus has done something dangerous or disobeyed Harry's instructions. For example, if Albus got involved with some dark magic related stuff without Harry's knowledge, that would surely make Harry yell at him.
One possibility is that the Justice League would be divided. Some members might side with Superman, believing he had a good reason, while others would stand by Batman. This would create a power struggle within the league.
In this fanfiction, perhaps Albus Severus Potter would be in awe of seeing his parents. He might have a chance to truly understand their heroic deeds through direct interaction. His parents could offer him advice on how to deal with the challenges he faces at Hogwarts, like the pressure of living up to the Potter name.