Yes, there are many things they can do but they dont want to. About Neal, yeah, see there is already a Neal on the show that is Snowing Son, the only way MRj could appear as Neal would be in flashback, which wont happen, so any full time job, doesnt even requires MRJ, they can bring young Bae and let Rumple and Belle raise him, and he would not have memories, so no problem to Cs and he could bond with Henry paralleling S3B when he didnt remenber Neal, so yeah, if they want to bring Bae, they dont even need MRJ unless for one small scene to de age him, but u see, that would have to be done on this arc, not in any other arc, but that wont happen, and even tho this option is not from my like, if would mean people would leave MRJ in peace and stop wishing that he doesnt get other jobs, so that he can return to ouat and at same time would give Bae another chance, so do it.
I am not wishing that MRJ would not get other work. I was hoping he was going to be on something interesting, that show doesn’t sound good to me and it is on NBC which means it will be overly violent. I am allowed to feel that way. I even said that i think, most likely, he will not be back, but i have no desire to see a young Bae as a regular on this show. Neal told Rumpel specifically that he didn’t want to be turned back into a child, so i hope they don’t do something like that.
My entire point though, is that if the stars aligned and MRJ wanted and could be on the show, he could be written back into the show quite easily. I actually think that most likely “Neal’s Warning” is just the name of a song and does not mean Neal will be on the show. I think there is very little chance it is baby Neal because he is not a character and will be happily safe off screen like he was in Camelot.