Things Fall Apart posted a great game on The Star Wars forum, and I thought it would be fun to do something similar with the MCU.
These forums suggest that fans have varying attitudes about the way MCU films have interpreted their source material (as they should). So how would you have done it differently? To adapt Things Fall Apart's game:
You are allowed to change any ONE thing about the general plan of ONE MCU Phase. You can tweak or substantially alter the basic plan of each, but you have to explain how you think it would impact what's come after. AND everything that happens prior to your change is totally unaffected. Since we're talking about how the MCU has it has been built over the last decade, you can't have Sony or Fox cut their deals any earlier; work with what Feige and Co. had to work with. However, that does mean that the ABC, Netflix, and Hulu properties are all fair game.
So ultimately your change could end up resulting in a butterfly effect, which means you have a lot of writing to do, or it could be something very small.
Feel free to prod and examine other people's changes but let's not attack each other. Also, if you like a change and want to expand on someone else's go for it.
For me:
Just as The Avengers was the capstone that all Phase 1 built toward, I'd have said the capstone of Phase 2 will be an Avengers versus Masters of Evil film, and the Phase 2 films all have to build towards that. The goal is to do some world building before we start splitting things apart with Civil War, and perhaps introduce a wider array of supervillains into the environment.
Except for postponing Guardian of the Galaxy to Phase 3, this doesn't require us to change any of the Phase 2 films (although heaven knows Thor: The Dark Wold could have used some revision). It does require that we have some loose villains running about at the end of each film. One of A.I.M.'s creations, for example might be Living Laser, or The Ghost. Baron Zemo might be one of the outed Hydra officers, who takes possession of the injured Crossbones after the collapse of the Triskelion, while talking about needing to get to the cell where they're holding Blonsky as swiftly as possible. Kurse's prison break might free a number of Asgardian rebels, including The Enchantress and The Executioner.