Boston, Cleveland, and Toronto are the obvious locks.
Washington, Detroit, Indiana, and Milwaukee seem solid, at least in terms of having playoff caliber talent. They've all had different struggles but I think they'll be there.
That leaves one spot for New York, Miami, and Philly. As others have said, Philly is going to struggle if Embiid misses any time and New York's collection of assets has been overachieving. Miami isn't great but they are relatively deep with actual NBA talent, so I'd bet on them holding the 8th spot at the end of the year.
EDIT: I guess Brooklyn, Charlotte, and Orlando are within distance, too. Brooklyn has played admirably and I would be ecstatic to see them make the playoffs but I just don't see how they get to something like 42 wins. Orlando is 5-18 in their last 23 games, which is more in line with what we thought they'd be preseason, anyway. That's probably who they really are.
Charlotte is weird. They have real NBA talent but is this team with Dwight 6 games better than last year? It doesn't look like it. But they're weird enough that I wouldn't be surprised if they cranked up the defense and won 44 games. Stranger things have happened. But I'm not betting on it.