The cannibalistic / human sacrifice reference in John 6 also sinks the wt interpretation of it. A partaking for all is clearly implied. Partaking will lead to everlasting life, an assured resurrection, not directly* to immortality as the wt "144 000 anointed " doctrine has it.
* in the "revelation" book they hint, that partaking leads to everlasting life on earth, and the "anointed" have to sacrifice that aquired right to go to heaven.