Re: Power man & Iron Fist -- a business perspective
I'd go with a heroes for hire movie...no need for solo. Just merge their two origins. Merge the man who killed Danny Rand's father and the man who framed Luke Cage into one person, and have them encounter each other on their own quests for revenge.
The in #2 the heroes for Hire Concept could come into play.
Dream MCU phase 3:
2016: Thor: Ragnarok, Doctor Strange
2017: Captain America: Secret Empire, Black Panther
2018: The Incredible Hulk: Rise of the Leader, Guardians of the Galaxy: War of Kings
2019: The Inhumans, Avengers: Thanos Imperative