2. The Inhumans
With Marvel working now on a new comic centered around these characters being modeled after Game of Thrones, the idea of a movie seems more likely now. Their origin story is a very deep and complex one, and for a while we thought that Marvel was going to make a movie about them instead of a Guardians of the Galaxy movie. Not only they are incredible characters, but their story in general can be done in a movie with astonishing results. According to several sources, back in 2011 Marvel commissioned several scripts based around their characters to see if they wanted to make a movie out of them (A script based around the Runaways was proposed, as well as one based on Black Widow that was received very well by the executives) and a script of the Inhumans was also made. In the same year, a longline was discovered that said "The Inhumans are aliens who were put on Earth as sleeper cell agents to eventually call back their race to take over the planet. Ultimately, the group of aliens fully assimilates and dont want to cause war." With a plot like that one, a movie based around them would be the perfect set up for The Avengers 3.