We have seen more than half a dozen heroes fight side-by-side. We have seen those battles take place on Earth, in space and in the mirror realm. We have seen blue and purple faceless antagonist aliens drop from heavens. We have seen technology developed by The Avengers bring mankind to the brink of extinction time and again. We have heard so much quippy dialogue and seen so many oodles of visual comedy that it has almost ruined this filmmaking technique for years to come. We have seen Easter eggs and teases to future projects in the MCU. We have seen the first Iron Man's template recycled abou....