I loved the way that Civil War had its big action set piece where everyone’s facing off more towards the end of the second act rather than in the third so that after that huge battle, you’re left with Winter Soldier, Captain America, and Iron Man.
More than Captain Marvel, you could see a lot of Civil War in that ending.
Usually, these big, huge action movies have the climactic moment in the third act.
My original ending didn’t have the entire X-Family together the way they are in the film now.