I have zero doubt the state will appeal to the 7th Circuit and if Magistrate Judge Duffin's order is affirmed, they will try and find a way to retry him.
But, unlike most here, I also have zero doubt Steven Avery killed Halbach and dragged his nephew into it.
From what I sense, I think Steven is a very honorable human being. He didn't take a plea even though it meant he could qualify for parole the first time...so honor and dignity are his strong point! That said, I think if Steve DID kill TH (which he didn't) he'd take all the blame and would insist his nephew had nothing to do with it.
But seeing he didn't kill TH, there was little he could do to free-up Brendan.
His actions really completes the scenario of his/their innocence.