I haven’t watched the clip yet (will later tonight), but I saw on tumblr:
Most important line in the sneak peek?
“He was Neal to me” Neal hid who he really was from Emma. She fell love with a “persona” he created for himself. Not his “True Self”
And on the CS side, Hook didn’t introduce himself as Hook when he first met Emma. He used his real name Killian Jones, showing Emma his “true self,” and then later owned up to his persona of “Hook.”
And next season, Emma’s going to meet Killian Jones again and that is the man she will fall in love with.