I rather doubt it. However, I think we should all be thrilled that it is in fact DC that has turned out to the big SC case for RKBA. It's not like all 9 justices don't have first-hand awareness of the utter ineffectiveness of DC's draconian gun ban towards its stated purpose of reducing violent crime. They all work in DC, after all. It won't even cross their minds that there might be a crime-reduction effect associated with the particular law being challenged.
They probably live there too - and (ostensibly) have to submit to the same laws at question, and will have to live with their own ruling.