Board Thread:Spoilers!/@comment-4453062-20160217065238/@comment-24674051-20160427170955

Merlin may or may not have had unfinished business, but it would likely not be with anyone of the nevengers (unless it's possibly Rumple). His unfinished business would be with either Nimue, or Arthur.

Marian likely does not have unfinished business. She had accepted her fate in Regina's cell and probably made peace with the situation. Her "rescue" in There's no place like Home may have thrown a curve ball, but I still think she actually probably, like Neal, has already moved to the better place.