Y'know, I still feel that The Avengers is a movie that hasn't aged one bit mostly because of how purposeful it was. The entire movie is wholly contingent on the audience collectively rooting for the concept itself to succeed which is why it's so wonderfully self-indulgent and optimistic about making it happen. Experiencing how that movie was the payoff after years of buildup was one of the most amazing things I got to experience and I'm sure that's a sentiment shared with many. So rewatching that Road to Civil War super cut that was posted a page ago it dawns on me how so much of these concepts are still important to the social osmosis. Ever since Avengers ended the lingering questions are constantly posed; how far this concept can be taken and when the train will run out of steam. Ultron was fairly overstuffed, though it didn't necessarily deter the trajectory - even if it raises a whole bunch of skepticism. And I think that theme feels somewhat integral to this movie.
Maybe that's the real "reason" why some like to call this the true Avengers 2. Much like the first Avengers it seems to pose a sort of hard question in regards to it's own circumstance. Looking at it on paper it's easy to see how the MCU has practically gone out of control, hence the way Thunderbolt Ross recites all these major events, hence the way the entire "concept" is being threatened with a ball and chain, hence the entire ideological battle these guys are stuck in. I still feel like Ultron was a good movie but unlike the first one it felt like a good movie where the investment was comparatively on account of an inconvenience - less a sequel and more just an extended episode of the Avengers' adventures. That said many of those themes seem to be taken into account now as pivotal universe reshaping points for this movie and the MCU. In the first Avengers the question was "will this movie work?" and in Civil War it's "how can this universe continue in this same direction?" This seems more to be the movie that's actually challenging the entire concept of The Avengers, but this time in terms of it's continued existence.
Shit though maybe I'm just spouting obvious hot air but this movie is just really fascinating to consider and generally an important point that is going to make or break this movie (especially now that we've got one crossover movie this year that dropped the ball somewhat spectacularly). The part that got to me most in that fan made supercut wasn't the Steve call back, but Tony's line they threw in from Iron Man 3. "You start with something pure, something exciting. Then come the mistakes, the compromises."
Just capping it off with that it ends up really putting into perspective how, even among the jockular exterior, there's just been a consistent throughline among the ups and downs. It really feels like it sums up the state of the Avengers as of present; both in the actual movie and in terms of being a concept/franchise, and if the Russos pull this theme off well, Civil War could easily be the best movie in this franchise - assuming all these heroes on the big screen won't be overstuffing things. But that's just me spitballing.