I honestly don't see Miami being a problem for Brooklyn.
I don't think Wade will do what he wants against JJ.
I don't think Bosh will do much of anything against KG, Lopez, or Evens (or even Blatche).
Their role players can be kept in check.
Then their is LeBron, obviously. I don't think he can be "stopped", but throwing Pierce and Kirilenko at him at all times should slow him down as much as anybody.
The only team that I can see being a problem for Brooklyn is Chicago, assuming Rose is healthy. I don't think they have anyone to stop Rose. Jimmy Butler can check whichever wing is hot. Noah can anchor their D. Thibs should be the better coach, or at the very least more experienced.
We know the top 4 teams will probably be Miami, Brooklyn, Chicago and Indiana, but the top seed looks up for grabs at this point. Seeding will definitely be interesting, and all three of those teams will be gunning for Miami. Unless Oden becomes a significant player, I just don't see them making it out of the East, and maybe losing in the second round.