I’d like to see Robbie return for flashbacks. Not just for Neverland centric ones, but I wouldn’t mind seeing him play Young Malcolm from before Rumple was born. All we know is that Malcolm was sold to a blacksmith, and visited Neverland in his dreams. There could be more to Malcolm’s past that we don’t know about, and how he shaped up to be a good for nothing cheat with a loathsome reputation.