This has led to fans to speculate and debate on where the remaining stones can be found, and after 14 films there’s only one left: the Soul Stone. It stands to reason that it will appear in one of the final films leading up to Infinity War, but one fan theory believes that the Soul Stone has been with Heimdall this entire time.
The Infinity Stones are the ultimate MacGuffins for the Marvel Cinematic Universe.
Their presence has always been a centerpiece of whatever film they appear in, and the collection of all six will be a major focus point of the massive Avengers: Infinity War.