I suspect the Mets and the Marlins will both finish above .500. If they do that, it will be difficult for the Nats to pull away until late in the season.
I think they might be as well, but, again, if the Nats do what this team is built to do, this race won't be over by the end of May. If they get muddle around .500 til late July like they did last year, it could be a different story.