Yeah, there was just something weird there. I think i thought that their only goal would be to return to our world and while doing that they would do as you are saying, something to help them in the final battle, but that clip made me think they had another goal. The final battle could still be the family verses Rumpel or Regina or the Blue Fairy or like you said just good verses evil. Who knows at this point. We don’t even know all the players.
Maybe returning to fairytale land, returning the happen endings. Things like that too.