Amazon has the rights Netflix would want, and Netflix isn't going to subsidize a property that is a competitive advantage for Amazon in the key market (and, conversely, Amazon would rather let the property die than let Netflix have the streaming rights.) So, if SyFy isn't going to carry the load, it's probably either Amazon taking over or it dies.
I think the problem with that is that Amazon already has the US streaming SVOD rights, which Netflix would also need.
That IMO makes Amazon the more likely party to purchase the US rights that Syfy had.
Bit of a chance there they might, considering they have the rights to it in at least Australia