We’ll see what happens between Rumple and his son this season (episode 19). I think the creators just mean we won’t know where the interaction takes place until later (though I’m not entirely sure). Then again, they could just be trying to confuse viewers so we’ll be more surprised when we do find out. EK made it seem like we won’t know where the son returns to, but makes it sound cryptic to throw us off the trail (makes me wonder if we’ll see Neverland next season). But then AH hinted that we’ll certainly see Baelfire return this season, but he wouldn’t confirm whether Bae will return to SB or FTL because he wants to keep us coming back for more.
"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy