Jennifer also mentioned once again that the writers told her who Henry's father was way back during the pilot, further confirming that he is almost certainly not just some random guy.
All of this ties in nicely with creator Edward Kitsis's assertion that the writers have a "specific plan" for the character that should be an "a-ha moment" for the audience. Clearly, Henry's dad is important. And on Once Upon a Time, most important characters find their way to Storybrooke eventually.
It sounds to us like there probably will be a reunion between Emma and her ex-love one day. We can't wait to see the sparks fly!