I would say like 25 percent change he is someone else like Peter Pan or Jack. 99.3 percent he is Henry’s father. And 80 percent he is Bae. There is a lot of give with the idea that he went to another world besides our world first. That seems unlikely to me.
Another poster, Charming, made a great point this morning on the thread titled Baelfire. Stated that in not identifying Bae as Peter Pan or any other character at this point and time, it gives leeway for adding so many more characters into the story. So, you could be right hjbau.