I'll echo others that I wish they let good, completed character arcs lie.
But then "The Avengerz" from Thunderbolts just annoyed me, so maybe I'm part of the problem.
They seesaw back and forth between "no other heroes exist on the planet or would respond to this world-shattering event" like Eternals, and "everything is tied to an existing character".
There's plenty of fertile ground between them, with plenty of heroes who just haven't been introduced yet but aren't directly tied to the legacy of one of the few that the MCU has focused on.
To be honest, this trailer made me less want to see the movie. My only hope that "Steve Rogers will Return" is a complete twist, and it's not fighting-shape Captain America but with a new name because he gave that to Sam, but something else. I hadn't heard about whatever leak, so that may simply not be what's been revealed, but one can hope.