For those of you interested, here is a nice review of the 4K UHD 35th anniversary Disc;
The Goonies was shot on 35 mm photochemical film using Panavision cameras and anamorphic lenses. It was finished on film at the 2.39:1 aspect ratio for theatrical exhibition. For its 35th anniversary Ultra HD release, Warner has scanned the original camera negative in 4K to create a new Digital Intermediate and graded the color for high dynamic range (available here in HDR10). The resulting image is very good looking overall. Fine detail and surface texturing are strong—and pretty dramatically improved over the previous Blu-ray—save for some of the opticals and occasional shots exhibiting soft focus (or anamorphic softness around the edges of the frame). Film grain is light-medium and organic looking. Colors are accurate and bit more vivid, with added 10-bit nuance. The expanded contrast offers deep black shadows with enhanced detail in most shots, though occasionally they look a little gray. Highlights are bolder, which is especially effective given the film’s exterior overcast skies (not to mention lantern light, water reflections, and the aforementioned treasure). All in all, this is a nice presentation that certainly represents the film looking better than ever.
The 4K disc includes a lossless English 5.1 DTS-HD Master Audio encode that’s improved yet similar in quality to the 5.1 Dolby TrueHD mix found on the previous 25th Anniversary Edition Blu-ray release from 2010. The soundstage is big and wide across the front, with the surrounds used mostly for music and atmospheric fill. There are some nice panning and directional effects, but they tend to be more subtle. Dialogue is clean and clear, while the music and score are presented with excellent fidelity. The overall tonal quality is full, with a solid foundation of low end, though the mix still retains much of its original stereo character.
There are no extras on the 4K disc itself, though the package also includes 2010 Blu-ray release. (Note that this disc is definitely not mastered from the new 4K scan.)