I think they have a passion to stick it to Obozo and will rule 5-4 to 6-3 to strike it down completely.
I see a 4-4 deadlock with Kagan abstaining. That would kick it back to the three Appeals Court s for review. That is the only politically correct decision to make for the SCOTUS. Anything else and one side or the other is going to play holy Hades over the decision.
OTOH, should the justices reach unanimous consent to either keep or overturn DeathCare, then any backlash would be blunted.