Getty Images Priceline’s stock looks set for a big down day.U.S. stock futures on Wednesday pointed to a decline at the open, as premarket drops by Priceline, Netflix, Disney and TripAdvisor weighed, and as analysts also blamed the retreat on worries about escalating U.S.-North Korea tensions. North Korea threatened a missile strike on a U.S. military base on Guam, with that saber-rattling coming early Wednesday in that country after President Donald Trump on Tuesday afternoon said he would respond with “fire and fury like the world has never seen” if the Asian country doesn’t halt its threats. S&P 500 futures ESU7, -0.32% lost 10.80 points, or 0.4%, to 2,462.00, while Dow Jones Industrial Average futures YMU7, -0.10% shed 40 points, or 0.2%, to 21,990.00. Futures for the tech-heavy Nasdaq-100 NQU7, -0.49% gave up 34.50 points, or 0.6%, to 5,883.50via