Board Thread:Spoilers!/@comment-1916997-20180306160338/@comment-24304025-20180506132825

I honestly don't think they will all merge back to their present selves, because that would mean Adult Henry would vanish into inexistance and keep waiting for the time to come for him to meet Ella and birth Lucy etc.

It's weird. They can't merge all into their future selves, because many characters don't have a future self yet, unless everyone else automatically skips 13-ish+ years.

I believe they will go the second way, with Snow and co. traveling to the future so that they will be concurrent with Adult Henry and co.

The safest way would be to leave things as they are, with their past selves living normally up to the time when Gothel's curse is cast. A solution would be putting the HH crew in some kind of stasis and leave behind a note for the SB Henry that, when it comes 2030-ish he will be sent back to the past, so that he has time to bring the SB crew back in time with him and then they wake up the HH crew and both Henry's merge.