Right now, I think the 76ers are the better team to win right now in the East. I believe that Harden, Embiid and Maxey will be a good trio and add Tucker who is a great role player and defender. I also have doubts with the Nets as well. Will the chemistry as a team there after the drama that Kyrie and KD did? Will Simmons play the whole season and is there any changes in his playstyle? Let's just see during the regular season but I'm predicting the 76ers to win the East. Too early 
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I have different rankings when it comes to the East. Yes, the 76ers are a strong team now but I think the Miami Heat will be hungry again. .They've seen their weaknesses last season so now they know how to strengthen them. Plus, they are a young team with so much talent on their roster.
So it's either Heat or 76ers on the top and next to them are Celtics, Bucks, and Nets fighting for the 3rd.
But that's only for the season, the difference will be seen in the playoffs as the Heat are shaky when that event comes.
It's really hard to predict the East, if they are all healthy, I would agree that maybe the Sixers or Heat will be on top. And then Joel putting MVP numbers, but Butler being the leader of the Miami will push once more. And of course there is still Giannis, also putting great statistics and the big 3 of Nets seems to be enjoying their camp with KD, Harden and Simmons already saying praises for each other as if they have played together, Lol. Celtics might be the big underdog here, eventhough they have reach the finals, the shakeup in the organization might have put a dent on some of their players. Blake though might be good addition because Robert Williams is injured.