Board Thread:General Grimm Discussion/@comment-81.159.60.94-20161026213925/@comment-71.121.179.246-20161027113824

It's certainly plausible that the stick is a piece of the cross; Renard did tell Nick that was one of the legends as to what the Crusader's treasure might be back in season 2.

As for Juliette/Eve, we won't know the answer until season 6 starts.