At one point, there were two different endings to John Wick: Chapter 4. But the conclusion that director Chad Stahelski and star Keanu Reeves preferred ultimately ended up in the final theatrical cut.
Major spoilers ahead.
Wick is presumably dead at the end of Chapter 4, as we see Winston and the Bowery King standing over his grave. This comes after Wick has a duel with Caine (portrayed by Donnie Yen) that fatally wounds both assassins.