When I bought Borderlands 3 at launch I elected to not get the Super Deluxe version with the expectation the season pass would be relatively cheap when it was released. Wow, was I ever wrong! At this point the only place you can buy the season pass for Xbox One is directly from Microsoft, and it's price is an eye-watering 69.95! That's more than I paid for the full standard edition of the game.
Does anyone know if it will likely fall in price or become available anywhere else?
Yes to both. But it will take time.