The developers support not only Diablo 4.
Blizzard Entertainment announced the launch of a new ranked season for Diablo 2 Resurrected in October:
«12th ranked season — a new chance to participate in the leaderboard race: reach level 99 as quickly as possible and acquire powerful equipment. We can't wait to see which of you will have the determination to break into the leaderboard this time!».
As usual, there are several game modes available — "Normal" and "Heroic", in which the character has one life. You can choose the option of completing four acts of the campaign or five acts + DLC Lord of Destruction.