Copying and pasting my thoughts on this from a post in another thread…
Have come to the conclusion that there are only 2 characters whose names would give away too much if revealed in a casting spoiler: Baelfire (coz obviously everyone’s waiting for him to be announced) and Peter (coz they’ve made no secret that Hook is coming, so it’s reasonable to assume that Peter Pan will be too). I know we’re waiting for a Jack to be cast as well, but that wouldn’t be something they’d feel the need to keep top secret, I wouldn’t think, despite the fact that Jack could potentially be Bae, but revealing a casting for Jack wouldn’t confirm or deny that theory.
Anyway, despite the fact that Bae is the casting that all the fans are anticipating the most, I reckon the reveal of him as Peter would be even bigger, because Peter Pan didn’t age, so if the OUAT version of him looks like this guy, that could give away something huge about how they’re planning on tweaking that story. Add it to the fact that his casting announcement came at the same time as the casting for Hook, and I’m almost willing to put money on the fact that he’s gonna be a grown up Peter Pan.
Also, the more I look at pics of him, the more I reckon he looks like he could be Henry’s father. Though I confess that I may be viewing his pics with a biased eye, because of my theory that Peter Pan stayed in our world and aged and hooked up with Emma.