Pre-purchase of Diablo IV has been posted including seasonal pass. What is the price of seasonal pass? If Diablo IV has an ongoing price for each season, I will not be playing that game.
This is the forum for the original Diablo 1. Currently, there is no Diablo 4 forums, however, the Diablo 3 forums are temporary location for anything D4.
The Seasons/Battlepass are free and part of the base game you pay for. There ARE paid versions though - which give cosmetics. You can not buy power in D4. So, unless you want the cosmetics, there is no reason to pay for the Battlepass.
There are a lot more details in the Aug 2022 update blog.
You can read more about