My prediction is that Roberts is going to write the majority opinion -- and an eloquent, effective one at that -- in a case that ultimately will overturn key provisions of ObamaCare. Based on what I've seen up to now, I believe it will be one of the many religious liberty cases winding their way through the Federal courts. Remember that Hobby Lobby successfully won a stay against the U.S. government in their ObamaCare challenge on these very grounds, which have always (and I've said this since 2010) been the strongest basis for a legal challenge to ObamaCare.
As long as the districts and circuits follow the lead, SCOTUS won't have any reason to hear one of the cases you allude to.
After the obamacare case and now the gay marriage case - where religious liberty and state’s rights were eviscerated, you really believe that?
There is not a chance that Roberts will be party to any ruling overturning ObamaCare. He has already laid his marker in service to this horrendous law - including his ruling last week; going so far as to re-write bad law to make it palatable to his sensibilities. He did the same earlier when he willingly called a penalty a tax in order to strike down the constitutional challenge to requiring everyone to buy medical insurance.
Roberts has gone over. You rest your hopes in him at your peril; he will betray you every time his vote is needed to uphold conservative values.