Board Thread:General Discussion/@comment-1031724-20170607203709/@comment-1031724-20170612232428

Well, there's only three films before Infinity War, and it needs a film where it plays a prominent role like the other five have.

Spiderman: Homecoming - Not likely.

Thor: Ragnarok - Likely. Maybe it's in Hela's possession and she intends to use it to bring about Ragnarok. (Maybe at the end Loki gets it and we see he's still in contact with Thanos)

Black Panther - Maybe it's somewhere Black Panther and/or Killmonger know about. Maybe it's even in Black Panther's possession, a sacred treasure of Wakanda.