Related: Did Infinity War Trailers Already Reveal The Soul Stone? Ahead of Infinity War, some art has made its way online (via Reddit user Suprxeme), showing where the stones are and who has them.
The Soul Stone has the potential to be the biggest threat of all the stones, not only helping Thanos complete his Infinity Gauntlet, but also the power of the stone itself.
The art comes from the movie tie-in novel, IncrediBuilds: Marvel: Infinity Gauntlet Deluxe Book and Model Set.
While it is unlikely that Thanos will complete the Infinity Gauntlet until at least the end of the movie, the hunt for the Soul Stone promises to be a major plot point.