Walt Disney Pictures and Marvel Studios have set release dates for two mystery projects that will hit May 6, 2016 and May 5, 2017. At this stage, however, speculation is out as to what those films might be.

This past May saw the release of Iron Man 3 and the official launch of “Phase Two” of the ongoing Marvel Cinematic Universe. On November 8, the universe continues with Thor: The Dark World and, in 2014, we’ll get Captain America: The Winter Soldier on April 4 and Guardians of the Galaxy on August 1. Marvel’s The Avengers 2 then concludes Phase Two on May 1, 2015 with “Phase Three” launching later that year when Ant-Man hits theaters November 6.

It has been hinted in the past that Marvel has plans for new characters in Phase Three like Doctor Strange and The Black Panther. Either of those could take on these future release dates as could a Marvel’s The Avengers 3 (likely for 2017), another sequel to an existing film or even a completely new surprise. Only time will tell, so check back for updates as they become available.