I think the Obamacare decision was ultimately pro-corporate because the insurance companies had given their blessing to it.
The Citizens United case might have gone the right way, but probably not because it was the correct decision. More likely the more pro-corporate decision.
The whole gay marriage thing is pro-corporate because it makes it easier for global corporations to craft human resource policies that apply to all of their employees regardless of what state they live in.
It might have made sense for conservatives to be pro-business when businesses were run by patriotic Americans and were more locally owned, operated, and oriented.
But now that huge swaths of the economy are run by global corporations that want the laws to be the same everywhere, then it doesn't make much sense for conservatives to support corporations in general.
We lost the universities. We lost the arts. We lost the government. Now we're losing the business world.
It's truly sad, and the Supreme Court is no longer the last bulwark against creeping socialism.