I think this will depend greatly on (obviously) how well they start off, but more importantly, how well Castro and (potentially) Olt start off. If they play well, no need to rush the prospects or start their clock early. I don't think Castro's performance next year, either way, is going to be much of a factor in delaying/speeding up Javy's or Bryant's promotion to MLB. If they are performing well in AA/AAA and the FO feels they can handle MLB they will be up and find a spot for them somewhere. They aren't going to rush one or both of them because someone at the MLB level isn't doing well and call one/both up when they aren't ready and risk ruining on or both. If they are doing well and Castro is doing well there are enough potential open spots between 3B/2B/LF/RF that they will be able to get them in the lineup everyday if they feel one or both is ready.