Not just objectively....
Feige explicitly said that it was the endcap of Phase 2
How does Ant-Man fit into what you call the Phase Three cycle of Marvel movies?
FEIGE It really is the movie that closes out Phase Two. Phase One ended with Avengers. So some people thought that Phase Two would end with an Avengers film. But the truth is, there is so much in Ant-Man: introducing a new hero, introducing a very important part of technology in the Marvel universe, the Pym particles. Ant-Man getting on the Avengers' radar in this film and even – this is the weirdest part, you shouldn't really talk about it because it won't be apparent for years – but the whole notion of the quantum realm and the whole notion of going to places that are so out there, they are almost mind-bendingly hard to fathom. It all plays into Phase Three. It became very clear that Ant-Man is the pinnacle and finale of Phase Two and Captain America: Civil War [May 6] is the start of Phase Three.[/quote]