OH GOD YES STAND USER HITLER. That would be insanely awesome. Ridiculous, but awesome. And that's what JoJo is all about.
I think the idea was that Pucci wanted to erase the Joestars to create Dio's "perfect world", but since he was killed before he could finish it properly, it snapped back to a slightly-altered timeline and the Joestars remained.
EDIT: Also, am I too snarky these days?