Most of the Marvel Studios movies have included what will eventually be known as the Infinity Stones.
Here is a nice summary of where they are and clues to what they do:
http://www.ign.com/wikis/marvel-studios-cinematic-universe/Infinity_Stones
It will all come to a head with Avengers Infinity War and Avengers 4 which, last I knew was still untitled. The movies are being shot back-to-back.
Thanks for the link. While snooping there, I was reminded that there was supposed to be a second Ant-Man movie, and found out it’s titled “Ant-Man and The Wasp” to be released next year.