As great as it is to see all the "what if" talk for Stanton, it just isn't going to happen. Yes, I agree that he will hit 50+ bombs a year within a year or two and I have a feeling he will be doing that for the next decade.
MDS, LaRoche and Morse will still be playing in two years. In six they will both be gone and Stanton will be well along on his way to the HOF. Nats really don't match up enough with the Fish to get him and I don't think anyone team sans maybe Texas has enough bullets in the minors to land him. Remember that Stanton is getting league MINIMUM and the fish will only let him go for young long term controlled talent.
This may be one of those cases where he has to ride out his time in Miami and then jump ship in FA and become a crazy well payed guy similar to what A-Rod did while with the Mariners (even though the M's were competitive at that point).