The Bad Guy Wins / Toys

  • BIONICLE's Big Bad, Makuta Teridax, ended up becoming the universe itself and enslaving everyone in it at the end of the "Mask of Life" saga, which also marked the end of the original major Myth Arc. So yes, while the Toa managed to fulfill their mission set up eight real-world years before, namely to awaken the Great Spirit Mata Nui and thus save the universe, Makuta possessed Mata Nui's body in the nick of time. Also counts as a Sudden Downer Ending, because this was all revealed in the final chapter of a novel and on the last pages of a comic, while everyone was celebrating.