Video game company XFlag is the developer behind the Marvel Tsum Tsum game as well as another game called Monster Strike. Recently a new update on the Marvel Tsum Tsum game featured a new Tsum Tsum from the Monster Strike video game. Now Disney Store Japan has release previews of a new Monsters Strike + Marvel Crossover Tsum Tsum Set. The set will be released in Japan on Oct. 7, but is available for pre-order now on Disney Store Japan website for 3,780円 per set. No word yet if this set will be released at any other location other than Japan at the moment. As always stay tuned for more information about this great new Tsum Tsum set as well as more Tsum Tsum news.