Many people who’ve seen both materials will know many common facts between the two, such as the Queen of Hearts being the overarching antagonist, or Alice = Arisu, white rabbit = Usagi, etc.
But one fact that’s commonly overlooked is that in Wonderland, the first royal guard Alice meets is the 3 of clubs. In Borderland, the first game Arisu and Co. take on is the 3 of clubs, in both manga and show. This further links the show, adding to the smaller details.
by AverageUKperson