I think that is a sign that we will see people start taking over the "mantle" for Iron-Man, Cap, Hawkeye, and other long-standing heroes. They do it in the comics, and it is a perfect way to send off older actors while keeping the "character" intact. Falcon could become new Iron-Man or sorts, Buckey could be a new Cap, and after a few Spidey movies they could replace Peter with a new actor+character named Miles.