“Here is the way the Court phrased the granted issue:
Whether the following provisions D.C. Code secs. 7-2502.02(a)(4), 22-4504(a), and 7-2507.02 violate the Second Amendment rights of individuals who are not affiliated with any state-regulated militia, but who wish to keep handguns and other firearms for private use in their homes? “
Hopefully the unorganized militia will be taken into consideration... along with the words The People...
In brief, they will uphold an "individual" RKBA, but allow so many restrictions as to render it moot and not change the effect of existing law: e.g., the DC bans will be ruled unconstitutional, but the SCOTUS will allow police authorization to be required, registration, blah, blah, blah.
So you'll have a nominal RKBA, but no existing gun control regimes will be disturbed and no future ones prohibited except outright bans by the Feds.
Looks like they've taken the whole enchilada.