Amazon has put up the product page for the Lupin the 3rd: Island of Assassins Blu Ray DVD Combo Pack, revealing its North American cover as well as several other details. If you are interested, you can preroder the physical release of the latest Lupin movie with this link from the shopping website. You can also find the cover of Island of Assassins with the image located just below this paragraph.
Furthermore, you can take a look at a synopsis of Lupin the 3rd: Island of Assassins below (via the above-mentioned Amazon listing):
Lupin is framed for the murder of Inspector Zenigata by a mysterious assailant holding a silver-colored Walther P38 pistol Lupin himself once owned. Tracking the true killer leads Lupin to the island of the bloodthirsty Tarantula assassins inside the Devil’s Triangle. After joining the spider-tattooed army against their will, Lupin and his gang make both new friends and enemies as they not only plan to take home the Tarantulas’ massive gold repository for themselves, but hunt down the shooter from Lupin’s past.
Can Lupin put to rest this demon who haunts his memories with the Walther P38? English dubbed, Japanese language, English subtitles.
The Lupin the 3rd: Island of Assassins Blu Ray DVD Combo Pack is coming out on the 30th of May in the North American region.