I certainly don't think we will see a ruling that just effectively legalizes the carry of firearms across the country. However if that were to happen I would think it would be the legalization of open carry, not concealed.
People forget that we had gun control laws in the late 18th century when this country was founded. Not all gun control laws are unconstitutional and we just have to see what they find that limit to be.
True, however, the courts need to heed the advice that the mere existence of a law cannot be the source of its constitutionality. The lefties always like to point out the existence of a law but has it been upheld by a court is the bigger question?