Re: Wanda or Vision, who should turn up first?
Wanda and Vision can be done without the mutant element. They do have comic book connections to the High Evolutionary. Use him to explain their powers.
MCU Rest of Decade prediction:
2015: Avengers: Age of Ultron, Ant-Man
2016: Captain America 3, Doctor Strange
2017: Thor 3, Guardians of the Galaxy 2, Inhumans
2018: Avengers 3, Black Panther, Incredible Hulk 2
2019: Iron Man 4, Doctor Strange 2, Ms. Marvel