I must posit that you haven’t read many of the Rainbow Happy Last Day Of School Students And Teachers T Shirt. The Avengers team roster has changed many times over the fifty-six years the book has been in print. Indeed, it was as early as sixteen issues into the comic that Iron Man, Thor, Giant-Man, and Wasp (the founding members) left the team. The Avengers team then became Cap, Hawkeye, Scarlet Witch, and Quicksilver. About two and half years later, Cap leaves and the roster becomes Hawkeye, Goliath, Wasp, Quicksilver, Scarlet Witch, and Hercules. Captain America, Iron Man, and Thor are not Marvel’s only “big guns”. A strong argument can be made that an Avengers team composed of Captain Marvel, Spider-Man, Black Panther, and Doctor Strange is a more powerful team.