This is my mini theory on what Season 2 might start out like…
I feel like Season 2 will start out with the clock stuck at 8:15 just like when Emma arrived. This time though, the curse will be the one that Rumple unleashed. Everyone may have their memories, but since time is once again frozen, it is 28 years in the future AGAIN, and they need to break that curse this time around. OR Emma will be the only one who believes now (besides Henry) and she has to break this curse again.