They would be devastated. Some might go into a state of shock and denial at first. For instance, Robin might isolate himself to try and figure out if there was anything he could have done differently. Superboy could become extremely angry and start lashing out, blaming others or himself for not being able to protect Blue Beetle.
Well, one possibility is that it could be a heroic sacrifice. Blue Beetle might be facing an overwhelmingly powerful enemy that threatens the entire team or the world. He decides to use his powers to the fullest extent, knowing it will cost him his life, to save everyone else. For example, he could hold back a massive explosion or an alien invasion single - handedly.
If they team up with Superboy, Blue Beetle could use his suit's advanced capabilities to analyze any threats while Impulse scouts ahead. Superboy could then provide the brute force when they encounter enemies. Blue Beetle might be a bit in awe of Superboy's strength at first, and Impulse would probably be impatient to get into the action. But they would all work together well, with Impulse's speed helping to keep the group coordinated.
In many Young Justice fanfictions, Blue Beetle is a symbol of hope and new - age heroism. His connection to the scarab, which is an otherworldly power source, gives him an edge. He can be used to bridge the gap between different groups of heroes, whether they are from Earth or have extraterrestrial origins. His character also has room for growth, as he discovers more about his powers and his place in the Young Justice world.
Blue Beetle is an interesting character in Young Justice fanfiction. He often brings a unique dynamic to the stories. His powers and origin story can be explored in many different ways. For example, some fanfictions might focus on his relationship with other characters in the Young Justice universe. His beetle armor gives him a cool and distinct look, which can be a great visual element in the fan-created stories.
Some members of the team might be overjoyed. They could see it as a sign of new life and a positive change for Spitfire. Others might be more cautious, worried about how the pregnancy will impact their ability to fight crime. For example, Batman - if he's part of the team's leadership - might be concerned about their safety and the potential risks to the unborn child during missions.
Superboy would be devastated. He has a special bond with Miss Martian, and her death would likely make him go into a rage. He might start lashing out at the enemy without thinking, blaming them for her death. Aqualad, as the leader, would feel a great sense of guilt. He would question his leadership and decisions that led to the situation. He might become more withdrawn and overly cautious in future missions.
Some members of Young Justice could be embarrassed. For instance, if there are romantic fanfictions about them that are a bit too cheesy or if their weaknesses are overly emphasized in a not - so - flattering way. But others might be really intrigued and want to explore more of what the fans think about them.
The idea of Blue Beetle's origin story is also a common theme. Writers might expand on it, or give it a different twist. For example, they might explore how he got the Scarab in more detail. His growth as a hero, both in terms of his powers and his character, is also often written about. He starts as a bit of an outsider in Young Justice, so his journey to fit in and become a respected member is a popular topic.
The Flash might initially be in denial. He's used to Batman always having a plan and his death would be a huge shock. He would then turn his speed into a tool for investigation, trying to find out exactly what happened. Green Lantern could feel a sense of loss but also be spurred into action, using his ring to try and prevent future tragedies like Batman's death. He might create constructs in Batman's memory to inspire the team.
Some of them might be amused. They could laugh at the creative and sometimes silly ideas in the fanfictions.