An Endgame Post Credit Scene
"Hey Sam. This is Steve. If you are listening to this I am no longer capable to be Captain America. When I went back in time to put the stones back, I decided to try out that kind of life Tony suggested. I saved myself after the plane crash and found Agent Carter. We got married and I never met any of you. However, I know what I would have become. The only people I knew who could fulfill that legacy was you and Bucky. But, Bucky would not be able to lead a team like you. Go back to the old Avengers HQ, and open the vault."
Sam hung up his cell phone and smiled. He activated his wings and began to fly over the city. When he finally arrived at HQ, he landed right in front of the door. He walked up multiple flight of stairs until he finally got to the vault. He carefully put in the code.
M-O-R-G-A-N. Tony Stark's daughter.
The vault swung open and inside, Falcon could see Captain America's shield leaning on the wall. Sam picked it up, and behind it revealed a suit. It was blue, with a star right on the chest. He was interrupted by the sound of footsteps. He turns around quickly to see multiple figures standing in the shadows.
"You got Steve's message to?" one of the figures asked.
"Who are you!" Sam semanded, raiding his wrist guns at the figures.
Spider-Man, Black Panther, Doctor Strange, Captain Marvel, and Pepper Pots all stepped out of the shadows.
"We're the new Avengers."