Great post Shikamaru!
The fact that they might break up after Age of Ultron, then have Civil War as the third phase just excites me for the finale... When Thanos comes to earth in The Avengers 4. That's when you'll get the movie you're describing. The ultimate team up, the chemistry, everyone pulling in the same direction to achieve the primary goal that assembled them in the first place. To protect the people of earth as their Avengers.
i think it's a real-time movie release issue vs. a comics month to month issue. if they can make 2-3 avengers movies a year, then they would. but since these movies can only be released in 2-3 year spaces, i think you have to plan for bigger things. feige will not be around forever. neither will whedon, russos, downey, evans, etc. you have to plan for things you can control now and they started this journey with iron man 1 and they are going to end it with thanos for this first mega phase. i think what they are planning to do is brilliant.


t: