It could happen, but it's actually kind of sad IMO. I mean joining forces really made the East less competitive, Celtics are not getting any younger, Bulls not there yet and who knows if Rose will fully recover, I don't see the Pacers or the Hawks getting over that "good 2nd round team" plateau, Knicks are still the Knicks until proven otherwise...Out West I don't think the Lakers, Spurs and Mavs have it in them anymore, Clips flip-flop too much and injuries might seriously hamper them...and overall when you think about it there just aren't that many elite players where you could say "Oh, if this guy goes there, it could be a wrap..." Deron ain't on that level IMO, and Dwight's the alpha bytch. We talking about Nash and he's 38 for Christ's sake.
Of course one never knows with injuries, free agency...but I expect the NBA to not be very competitive these coming years.