The 9th Circuit stayed Young v. Hawaii pending issuance of an opinion by the Supreme Court in New York Rifle & Pistol v. City of New York.
I'm pretty sure that the stay is a consequence of the court having voted to take the case en banc, and has nothing at all to do with any other case in any other venue.
Some people have speculated that the en banc panel would delay publishing an opinion until the SCOTUS opinion is published.
And they don't (usually) take a case en banc in order to pronounce "Yep, you got it right. Good job."
Of course we could get unbelievably lucky in the draw for the panel, but the odds are way way way against getting a 2a-friendly majority.
EDIT: My bad, maybe. The 3 judge panel ruling/opinion was vacated/null when the case was accepted en banc. The en banc oral arguments were stayed (postponed) pending NYSRPA at SCOTUS. I think. Does anyone have a link to the order by the Ninth staying Young? I can't find it, and see no news articles about it... but various people are claiming that's the case. The latest posting on the Ninth Circuit site for Young v Hawaii is the order for en banc hearing issued Feb. 8.
Maybe the Ninth just hasn't updated their site yet...