I'd like to put this to rest and say that I, for one, am thrilled that Brooklyn's health and lack of depth prevented them from returning to the playoffs for the 3rd straight year. There's no "crow" to be eaten about my prior worries about the Nets. If there was, I think it would taste a lot like Jaylen Brown.
I'm hopeful that the same thing happens this year. Since OP wants things to worry about with the Nets this season, worry about this... Brooklyn lost their starting PG at the start of last season. By default, Jeremy Lin is a significant improvement to that. Also, worry about the fact that Thad Young might be slightly overrated in general and if Brooklyn can get some decent defensive minutes at the PF position, it might not matter all that much (though it's important to note that Brooklyn's run in 2014-15 came with the addition to Thad, so his lose might be important). Brook Lopez, if healthy, is still an outstanding and potentially underrated offensive center. If you surround Lopez with defenders and shooters, and if guys like RHJ make a leap (he was their best player in advanced stats on both ends of the court and yet he missed the majority of the season to injury), they could do enough damage to sneak out of the bottom 5. Keep in mind that this is a team that has no incentive to lose games this year or next. So while they lack in assets, you can't completely rule out the possibility of them making some short-sighted additions that might help them remain competitive.
Really though, even as a self-proclaimed pessimist and avid reverse-jinxer, I'm having a hard time really convincing myself of a scenario in which Brooklyn vastly exceeds expectations. They still lack depth. I feel dirty admitting that though. So I'm going to go back to saying that I fully guarantee they'll go 82-0 if Brook Lopez misses the entire season to injury. That's a
LarBrd33 Guarantee.