Marvel Studios executive and producer Kevin Feige revealed in a recent interview that the studio has plans for upcoming movies all the way through the year 2021, although he didn't reveal which specific projects were being developed that far down the line.
"I could arguably say what we're planning for the year 2021. Will that happen? I don't know. But what we planned for 2015 in 2006 is happening."
2006 is the first year that Marvel Studios held a panel at Comic-Con, teasing Marvel Phase One movies Iron Man and The Incredible Hulk two years before their release. The studio will release the highly-anticipated Marvel Phase Two finale The Avengers: Age of Ultron and the first Marvel Phase 3 movie Ant-Man in 2015.
The producer also spoke about branching out further than the franchises laid out in Marvel Phase One.
""Five years ago, looking at our plan, we knew that if Avengers was going to work, the movies had to stand alone. Now we have to prove to the studio that we're more than just these five characters, these five franchises."
With Ant-Man laying the ground work for Phase Three, Marvel announced three untitled movies that will be released in 2016 and 2017 that will round out Phase Three, and will likely conclude with The Avengers 3.