Importantly, if they can recover enough of its DNA, they might be able to do a multi-generational reconstruction of the species.
In the first generation, its DNA is used to create a cross with a modern bison, hopefully producing viable hybrid offspring. Then in the second and subsequent generations, more of the ancient DNA is integrated into the offspring, until eventually its DNA is identical to the ancient species.
This technique was created with the idea of eventually bringing back the wooly mammoth. But bison would be a great first step.
Even just a comparion of 9K old and current bison would be interesting.