http://www.tvinsider.com/article/84025/arrow-cast-producers-on-the-shows-emotional-death/

Exec producer Marc Guggenheim says "we worked our way through our various different creative choices, (and) we realized that the thing that will give us the most pop” was what ultimately happened on Wednesday’s episode (http://forums.previously.tv/topic/41557-s04e18-eleven-fifty-nine/?view=getnewpost).