I'm assuming John Wick 5 will clarify. If it does, then this resolves after 5 confirms.

If it doesn't clarify (such as if it's a prequel or side-quest or whatever) then I'll extend the resolution date, indefinitely, until it's officially settled.

Resolves "Yes" if he actually died at the end of 4, resolves "No" if we get information clearly showing he hadn't died and the gravestone wasn't his.