I agree that it would be epic if the way to Emma’s heart is via Neal. However, it still seems too soon for such a big reveal. I suspect we won’t have confirmation of who Emma’s true love is (other than Henry) until the s3 finale. Otherwise, it would be too risky to viewership.
But would it really be a great big revelation that someone can get to Emma via Neal? How many times has she said she loves him, and now she’s hoping to find him. It wouldn’t even need to be a confirmation of TL endgame or anything, but it should come as NO shock to anyone who watches this show that doing something to Neal’s heart will get to Emma’s heart, due to the fact that she has love for him.