I remember thinking,

[medancer]

during today's second viewing of Endgame, that there was a lovely callback in it to Civil War (?), and how I wanted to make note of it here because while it's not strictly a spoiler as I recall, it could be.

Of course now, almost 12 hours later, I can't remember what it was...

;)

(no, not the "taking all the stupid with you" comment. That's from CA:tFA.)