D&D’s version of ‘Avengers: Endgame’ was supposed to close 5e, but we’ll never see it

If you’ve played enough of Dungeons & Dragons fifth edition’s published adventures, you may have noticed a recurring detail: mysterious black obelisks popping up in different locations (including Chult, Icewind Dale, and Phandalin) whose true purpose is unclear. More than a simple Easter egg or a 2001: A Space Odyssey reference, these clues were meant to set up a major final adventure that never came to fruition. And now, we know why.