The physicians in this forum almost uniformly argue that this injury could be significant long-term and many view him as DND. I'm not quite at DND, but much depends on those details: do they release the MRI dataset to whichever team asks for it? If not, they have something to hide. If no one really asks, we'll not know until the player is drafted and playing at a high level.
Or, they may view it as treatable, Eichel-style (minimally invasive artificial disc replacement - ADR), no matter what. He may be treatable, but as I mentioned, in the lumbar area it's not a 2-foot putt, because of the forces involved there, compared to the cervical (i.e. Eichel) and thoracic areas, as shown in the figure that I embedded in one of my posts. I would certainly consider him as a mid-to-late first round lottery ticket, but I personally like Catton and maybe Iginla more at 5, and maybe even some of the stratospheric defensemen (it pains me to admit), if we can trade one of our spare Ds for a high-level forward.