Playing lots of blasphemous and thinking about Morrowind has got me in the mood to do a megadungeon campaign, just gotta see if the more old school group I know is actually up for doing anything. Thinking of a byzantine/late roman mediterranean setting, pseudo-Christian mythology, where the gods are retreating from the world. The sky's turned sickly yellow, the rivers are running dry, crops and animals are born mutated or dead, the world is dying, and the powers that be are convinced that the way to call them back is with the fruit hidden in the Monastery of the Sacred Vine (tree of life analog, as a mystical grapevine), which is the megadungeon. Got lots of fun ideas for settings and monsters, communities of holy warriors and monks, angels and demons, non-standard fantasy stuff. Add a dark soulsy element where the Sacred Vine is kind of scary and mysterious, people who drink its wine become Implementi (i hope that's the right latin, as in "those who are filled"), overwhelmed by otherworldly light that blasts out of their eyes and mouths and burns to the touch, horrible angelic guardians created by the Vine's power, emphasize the horror element of fucking with an ancient power nobody understands. Maybe reskin clerics to reflect the state of the gods, if I feel like overachieving.
I just don't know today, in the year of our lord 2019, if I still have enough will to spend time making D&D stuff when I don't know if I'll ever have a group to run it for.