I hope this is the right place to post this,
I started a list about it here:
But I have noticed that lately more and more comics have a set prologue or introduction statement, like the Avengers' "there came a day.." intro. Now Green Lantern, Flash, the Avengers, and some others have a set intro.
"And there came a day, a day unlike any other, when Earth's Mightiest Heroes found themselves united against a common threat! On that day, the Avengers were born, to fight the foes no single super hero could withstand."
Earth's Mightiest Heroes, united against a common threat! On that day the Avengers were born, to fight foes that no single hero could withstand!
And there came a day, a day when Earth's Mightiest Heroes opened their doors to teach the next generation! On that day, the Avengers Academy was born, to train young adults to fight the foes no single super hero could withstand!
Those are just the Avengers intros, but Batman Beyond, Booster Gold, Doom Patrol, and others have intros.
I have added a few to my list. But there might be others I have missed. What do you guys think about this?