The CW Y-WIng is actually the proper scale for an OT Y-Wing (might have to factor in the guns as part of the length though, not sure). That makes it completely plausible they could do a "BMF" Y-Wing obviously, and do it perfectly sized... That'd be neat to me.
However, it's probably not likely to happen this time around since all indications have been from Hasbro that they weren't going to do a new OT Y-Wing, just modify the sculpt they already had. That was an old Q&A though now I think, so maybe things changed? I just doubt it though.
Are the "rumors" laying claim to it just being a reworking of the original sculpt? If that's the case, isn't that just pulled from the Q&A's then, since the ship turned up in European TRU computers, and not "rumor"?