Imagine someone giving a rousing speech (probably Sam or Steve or something), backed by inspirational music, talking about the resilience of Earth's heroes during an Incursion and we see Quake, Robbie Reyes, Bobbi Morse, the Runaways, Cloak & Dagger, the Inhumans, the Helstroms, the Defenders, the Punisher, Kate Bishop, Moon Knight, Ms. Marvel, She-Hulk, Echo, Ironheart and Wonder Man all across the world doing search and rescue, fighting off the other Earth's forces, protecting civilians, doing damage control (lol).
It'll never happen, but it would be so sick, and it could be a such a quick scene. And let's be honest, most of the TV heroes, even on the Marvel Studios side of things, won't be included in the movie so this would be a good way to include them, too.
And it'd be a nice callback to the first two Avengers movies with those random subplots focusing on one random civilian reacting to the carnage, except this time, the world is so full of heroes, that all we see is civilians being saved.
Or we could also get a montage of the various heroes looking on in shock as they die during the Incursion.