Knight0334,
I think it is very unlikely that the USSC will rule in favor of the "collective right" misinterpretation, given the overwhelming evidence to the contrary. However, this is a danger that the liberal judges will consider a ban on handguns to be a 'reasonable restriction' (on par with the time, place, and manner restrictions on the First Amendment's protection of free speech), because residents would still have access to long-guns. (The appellate court considered this argument and concluded: "We think that argument frivolous. It could be similarly contended that all firearms may be banned so long as sabers were permitted.")
If the
Parker ruling is upheld, there is still the question of whether the Second Amendment is incorporated (via the 14th Amendment) against the states.
Also, the
Parker appellate court notes that the USSC previously ruled that "prohibiting the carrying of concealed weapons does not offend the Second Amendment". (But no such ruling on open carrying. So you might end up seeing lots of people wearing holstered handguns in New York City in protest if concealed-carry isn't permitted there.
)