Board Thread:General Discussion/@comment-27464043-20151230192612/@comment-26921516-20180220002759

may not have been shown directly in black panther but the soul stone is still in wakanda. they just saved it for IW. the stone itself is in the meteorite that hit in africa where wakanda was created. the H in the thanos thing for the stones stands for Heart of wakanda ie the meteorite is the heart that wakanda is built around.