Blaine is likely to be a focus. His relationship with Kurt is a big part of the Glee story, and in the future, they could be facing new relationship challenges or achieving new relationship milestones. Puck could also be a central character. Maybe he has turned his life around completely and is now using his charm and skills in a positive way, like mentoring troubled kids through music. And Quinn, with her journey of self - discovery, could still be on a path of growth in the fanfiction.
I think Santana would be a key character. She has such a strong personality and her development from a bully to a more empathetic person could continue in the future story. Brittany might also be in the spotlight as she's always been a bit of an enigma and her relationship with Santana could be explored further. Additionally, Mr. Schuester could be important as he could be the guiding figure for the new generation of glee clubbers or dealing with his own post - glee club life.
Obviously, the Marauders themselves - James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. Since it's about them watching the future, they would be the central focus. They are the ones who will have reactions and make decisions based on what they see in the future.
Harry Potter himself is a likely candidate. He has endured so much throughout his life, from the death of his parents to the constant battles against Voldemort. Fanfiction could explore his post - war trauma and how he tries to lead a normal life.
Tony Stark is a likely focus. His intelligence and experience with technology, especially time - travel technology in the movies, make him a central figure. He could be the one to figure out the mechanics of time travel and lead the Avengers in their time - traveling adventures.
Tony Stark is likely to be a focus. His flamboyant and playboy - like personality could lead to some really interesting scenarios when affected by a love potion. He might make grand gestures towards someone he wouldn't normally be interested in. Another likely character is Natasha Romanoff. Her complex past and guarded nature could create a great contrast when the love potion breaks down her walls.
Yang Xiao Long could be a key character. Her brash and powerful fighting style might be pitted against the kind of foes from the Man of Steel universe. And Weiss Schnee, with her family's influence and her own ice - based powers, could also be in the spotlight. She might have to use her skills in a different context, perhaps in a more technology - heavy and super - powered environment like in Man of Steel.
I think Santana from Glee and Alex from Supergirl would be great to focus on. Santana is sassy and confident, and Alex is strong and brave. They could get into some really fun arguments or team up to take on a common enemy. Also, Quinn from Glee and Lena Luthor from Supergirl could be an interesting pair. Quinn's transformation throughout Glee and Lena's complex character in Supergirl would create a lot of drama and potential for great storylines when they interact.
I think Quinn and Black Widow would be an interesting pair. Quinn is used to being in a position of power and popularity in the Glee club, and Black Widow is a strong female character in the Avengers. They could have some really cool exchanges about strength and femininity.
I think Weiss could also be central. She comes from a powerful family and has a lot of influence. In a story about watching the future, her knowledge of politics and her strategic thinking could play a big role. Also, her relationship with the other characters, especially Ruby, would be important in how they all react to what they see in the future. Blake might also be central as she has her own complex backstory and her views on the relationship between humans and Faunus could be greatly affected by seeing the future.
Hajime Hinata is a very popular choice. His journey of self - discovery and his role in the game's events make him a central and interesting character to write about. You can explore his internal struggles further in fanfiction.
Obviously, Team Minato itself would be the main characters. That includes Minato Namikaze, Obito Uchiha, Rin Nohara and Kakashi Hatake. They are the core of this story as it's about them watching the future.