Board Thread:Spoilers!/@comment-25926288-20170203182557/@comment-1916997-20170417010905

So the connection seems to be that Black is going to go to Zelena for help, and she is going to need Zelena's ingredients from the first go at a time travel spell (Scarecrow's Brain, Tinman's Heart, Lion's Courage). Which also explains the flashback. Interesting.