The MCU as a whole is currently the highest grossing movie franchise in history (unadjusted for inflation).
The sheer success of the MCU is mindboggling. Without access to their mosticoniccharacters, Marvel Studios had to rely on lesser known heroes like Iron Man and Thor to build their franchise, and they pulled it off. What's more, they intended to build a coherent universe around said characters, with plot threads and characters weaving in and out of different films before coming together in a crossover, as well as having TV shows whose plots also tied into the universe. And it worked.
Characters fans have been clamoring for cinematic adaptations of are finally going to be seen on the big screen. Kevin Feige made a point of saying that the direction the MCU is going is a direct result of fans speaking out.
Kevin Feige originally announced that Captain America 3 would be subtitled Serpent Society to audience approval before feigning buyer's remorse and saying that he wanted to change the title right then and there to Captain America: Civil War, meaning that the MCU will have a major crossover event outside of the Avengers films. The audience roared in excitement before taking it Up to Eleven when Robert Downey, Jr. and Chris Evans suddenly walked out to the Avengers theme blaring and performed a brief skit.
Then Chadwick Boseman was announced as the actor who will play Black Panther and joined Downey and Evans on stage, where Downey and Evans proceeded to play Roshambo to determine which side Black Panther will be on in the upcoming Civil War movie.
Commenters noted that even though most of the announcements were little more than title cards with a bit of music, they worked because Marvel Studios presented them in front of an audience of fans and made it clear that the new slate was structured as such because it was what the fans wanted. AMC Movie Talk compared it with the DC slate announcement, which used simple white text in front of a black background and was made at a stockholders meeting.
This celebration of Phases 1 and 2 as a whole. The fighting, the running, the highlights, the sheer awesomeness from every movie up to Guardians-it really shows how much has been achieved in the most Badass way possible. Oh, and the Winter Soldier is shown as part of the Avengers, if in future.
Marvel Studios likely playing a big part in keeping a horribly anti-LGBT law from passing in Georgia by threatening to completely pull their highly lucrative business from filming in the state if it went through.