The Metropolitan has five teams that could conceivably win the division (Hurricanes, Islanders, Penguins, Rangers, Capitals). Philadelphia is having a questionable off-season, but has a trend of making the playoffs every other year (and a rebound season from Hart would put them back into the playoff hunt). So there's six teams in the metro competing for only 3 guaranteed playoff spots, and a maximum of five total. So we're already looking at the possibility of how the wild card slots are split between the Metro and Atlantic.
The Atlantic has two absolute locks for playoff spots - Tampa Bay and Toronto. Boston you have to figure is likely in as well, albeit there's a chance for some age-based regression and we don't know what's going to happen with their goaltending with Rask injured and Halak testing free agency. Is Swayman ready to be their #1? (Albeit, this concern is shared by plenty of posters here regarding Samsonov.) Florida had a really strong regular season (albeit COVID shortened) and looks to be getting stronger (aside of the loss of Dreidger), so they should be positioned well to contend for a playoff spot. Montreal is coming off a Cup Finals run, but they made the playoffs thanks to their division and are bound to regress with the Price injury, loss of Weber, and potential loss of Danault. They might be on the outside looking in, but will at least stay in the hunt. Detroit is probably still on the outside looking-in, but Yzerman is starting to make moves to accelerate their rebuild and make them a stronger team (plus they have infinite cap space to play with this off-season, and could end up taking advantage of cap strapped teams to add a couple more pieces).
Obviously a lot can still change in the remainder of the off-season, but right now the Capitals are going to be in a relatively intense fight for a playoff spot (either a metro or wild card slot). With the rise of the new Rangers core and the Hurricanes back in the division, it's entirely possible that one of the "old guard" teams (Pittsburgh and Washington) is either a wild card or left out of the playoffs entirely. The Capitals are going to need to do everything they can to stay ahead of teams like Pittsburgh, Florida, Philadelphia, and Montreal.