Click to see Spoiler:
Saw an interview with the guy who played the giant (his name is escaping me right now) and he said he has been called back but they haven't filmed it yet.

Also, I wanted to be spoiled a bit (but not too much!! lol ) so I went and looked at descriptions of upcoming episodes. I had thought maybe the dreams would be how they eventually communicate until I saw that David/Charming puts his life on the line to communicate with Emma and Snow. Not so sure now...