I have the same temptation since this poll is for overeager Marvel fans to declare some kind of victory over DC.
The truth of the matter though is The Dark Knight, and thus by extension its trilogy, is the only superhero movie to date to rise above the genre to the point where it is mentioned in the same lists as The Godfather, Goodfellas, and The Bridge on the River Kwai. I highly doubt Civil War will reach such heights, nor do I think Feige is particularly interested in making what is considered iconic cinema or achieving some higher form of artistic recognition. He wants to make fun movies that feed the hype for the next one.
So in that sense, I think we can already say we know which trilogy will be well remembered in years to come, and it is the one that already is so well received. Just a hunch.