There's an entire genre of fantastic arcade/versus puzzle games not named Tetris. And that whole genre lies forgotten in ruins now. The one game that survived the longest was Puyo Puyo, but ironically, you can blame Tetris for killing that IP in the end.

I wish any developer luck in trying to do anything at all with this genre, give me something new and I will be first in line to buy ten copies. But I don't think Pajitnov, or anyone else for that matter, will ever find even 1% of the success Tetris did. I just don't think audiences still want this genre anymore, they just want Tetris and only Tetris.