Charlaquin
Goblin Queen (She/Her/Hers)
My table uses a homebrew setting as far as the map went. But we still play in the implied setting.
Like, you could say that in 3e we played in a Greyhawk with a different landscape, and in 4e we played in a different region than Nentir Vale. But the gods, the flavor, the feel, the races, etc, were taken from the Players Handbooks.
That makes more sense in 3e and 4e, where there was definitely an implied setting, but now that 5e doesn't actually use any one setting throughout the core books, I guess the answer is definitely Homebrew.
. . . I'm not actually sure what Pantheon we're using - other than to say "all of them, or none of them, just drawing in whatever gods get mentioned in play. "
I think 5e does have an implied setting, actually. They take a very light touch with it, but there’s a lot of loose bits of lore sprinkled throughout. For example, we can gather from the player’s handbook that drow exist, and were exiled to the underdark (which also exists) at some point in history. And I think they’ve been gradually ratcheting up how much of this assumed setting they’ve been revealing in the books, with Mordenkainen’s Tome now revealing that the Blood War happened, more details on the history of the Elves and their cultural divides, presumably some info about the Gith/Illithid war, etc. It’s mostly realms lore, but the fact that it’s compiled by a Greyhawk character seems to indicate that the 5e assumed setting is probably an updated Planescape.