With Thor: Love & Thunder introducing the Mighty Thor, and Ms. Marvel's finale revealing that Kamala Khan is the MCU's first mutant, it's clear that Phase 4 is all about powerhouses. Obviously, the MCU is setting up a new generation of superheroes, just like Avengers, and some of the main possibilities so far are X-Men and Young Avengers.
The Avengers is so far the MCU's most important group of superheroes, with the iconic assemble including the Hulk, Captain America, Black Widow, Hawkeye, Iron Man, and Thor. It's a fun experiment to speculate which Harry Potter characters that are singularly gifted could be a part of this initiative if the universes were to merge.
Even though Hagrid is not one of the best duelists in the series, he makes up for that with his great strength. Much like the Incredible Hulk, Hagrid's size and superhuman strength would give him an advantage over other villains. Plus, his rough skin makes him extremely resistant, even spells don't affect him as much as other humans.
Hagrid's powers mixed with his determination and loyalty make him one of the best assets Avengers could have. The world can rest assured that Hagrid will not let any villain destroy this planet - even though he may end up burning some houses with a Dragon or something like that.
Not only is Sirius one of the bravest characters in Harry Potter, but he's also extremely good in duels. On top of that, Sirius can turn into a big dog at will, which is a very useful ability for attacking in battle or going unnoticed in certain missions - instead of using the old reliable cap and glasses.
Even though Sirius was ultimately defeated by Bellatrix Lestrange, his powerful abilities and intelligence led him to not only become part of the Order of the Phoenix but also to be the first wizard to ever escape Azkaban. This combined with his thirst for dangerous situations makes Sirius an ideal candidate for the Avengers.
Even though this witch is not one of the main characters in the franchise, Tonks is still one of the best characters. She's a Metamorphmagus, which means she can change her appearance at any given moment, a very useful skill if you're fighting super villains.
However, besides her magical abilities, Tonks is also a trained Auror, so she has fighting skills as well. This means the young witch can perform under pressure, strategize in battle, and has learned special defensive attacking and defensive spells. Tonks's gifts joined with her special training make her an ideal member of the Avengers.
Kingsley Shacklebolt is one of the highest-ranking members of the Ministry of Magic Aurors. He was even selected as Prime Minister after the death of Rufus Scrimgeour. Additionally, his unique set of skills allowed him to work as a double agent for the Ministry of Magic and the Order of the Phoenix.
One of the best duelists of his generation, Shacklebolt faced Lord Voldemort a couple of times alongside other skillful wizards and survived the experience, which proves that he could totally defeat some of the most powerful MCU Villains. A level-headed and talented hero, Shacklelbolt would make an excellent Avenger.
Even though Lupin is one of the unluckiest characters in Harry Potter, having to deal with his werewolf counterpart, he could use the beast in his favor. Not only is Remus an excellent duelist with a lot of experience defeating Death Eaters and controlling magical creatures, but his werewolf abilities could aid him in battle.
Remus is the only Defense Against the Dark Arts teacher who prepared Harry and his friends to fight Voldemort. He even taught Harry how to perform the Expecto Patronum, an advanced defensive spell. His exhaustive knowledge about defensive magic would make Lupin a powerful asset against some powerful magical villains.
Many people underestimate Fleur Delacour, mainly Hermione and Ginny, but it's more than clear that Fleur is more than a pretty face. She was selected by the Goblet of Fire to be Beauxbeaton's Champion because of her advanced magical skills. Even though she couldn't finish most of the trials successfully, she did a great job considering the tests were being sabotaged by fierce Death-Eater Barty Crouch Jr.
If that's not enough, Fleur is also a quarter-Veela, which comes with special hypnotizing skills. On top of that, she was a member of the Order of the Phoenix and she fought alongside them in the Battle of Hogwarts, for which she was awarded medals of bravery by both the British and French magical governments.
Many people unfairly think Alastor Moody is unhinged and paranoid, but he's one of the most famous and talented Aurors in the magical world. He doesn't ever underestimate his enemies and he's always two steps ahead of everyone else. His determination led him to be one of the most important Aurors against Lord Voldemort and his Death-Eaters, and he even lost an eye, a leg, and part of his nose during battle - which didn't stop him from fighting!
On top of that, this character has extensive knowledge of magical artifacts that combined with some of the technology in the MCU could lead to the creation of very powerful weapons and defensive objects. Moody is a determined Auror who isn't afraid of anything, attributes that, combined with his expertise and intelligence, would make him a great Avenger.
For those who think Ginny Weasley is not capable enough for the Avengers, they need to remember what Fred and George said about her: "size is not an indication of power." Ginny Weasley is not only fierce and resourceful, but she's one of the greatest duelists Hogwarts has ever seen, to the point where other students are terrified of crossing her.
On top of that, she helped Harry in the Ministry of Magic and she fought in the Battle of Hogwarts. Ginny is an amazing flyer as well, being a professional Quidditch player. Her combination of skills and Ginny's unfaltering courage could be very valuable assets for the superhero organization.
Whether or not Snape is a heroic figure is a debate that has been going on since J.K. Rowling published the seventh book. However, Snape wouldn't be the first morally ambiguous character to become a part of the Avengers. What's safe to say is that he has a particular set of skills that would definitely help him save the world.
Even though the Potions Professor isn't a particularly likable character, it's undeniable that Snape's great at his job. His ability to brew tremendously powerful Potions is invaluable as are his mental power and his dueling skills. On top of that, Snape is an animagus and can turn into a bat. All of this makes Snape the ideal candidate to be an Avenger.
The most powerful wizard in the Magical World, and one of the most powerful wizards in fiction, Dumbledore would be a great Avenger. Whether he would be the most powerful wizard in the MCU is open to debate, but he would still be an incredibly powerful superhero. More or less along Doctor Strange's level of power, there's no doubt Dumbledore could join this initiative.
Not only can Dumbledore perform all kinds of unthinkable spells, but he can also do it using non-verbal magic. On top of that, Dumbledore's proficiency in Occlumancy and Legilimency would give him an extra advantage. Furthermore, Dumbledore also possesses a superior intelligence that would allow him to defeat quick-witted villains.
A lot of people think Harry could only defeat Voldemort because he was lucky, and even though Harry had a lot of help in his heroic mission, there's no doubt there was more than luck to it. Not for nothing, Harry is the youngest wizard to become an Auror.
Harry has been fighting villains and dark creatures since he was eleven years old, saving the Philosopher's Stone from Voldemort, defeating the Basilisk and saving Ginny's life, and finally defeating the world's darkest wizard. His natural ability for dueling accompanied by his Auror training is the perfect combination for a powerful superhero.