I’m going to come out of left-field & say that from FTL – it’ll be Prince Thomas ( last time we saw him he’d disappeared at the well, after Cinderella had ‘tricked’ Rumple. )
& in SB – August ( Pinocchio ) – & I think it will relate back to when Emma was found by the side of the road.
Either way – the return to me, means something along of the lines of families being reunited.