Board Thread:Questions and Answers/@comment-33935463-20180426192324/@comment-37422009-20190313070326

No, I meant time skip, or time erasure if you prefer. I was discussing the actual canonical ending to part 5. And while Diavolo gets to perform the "cause," it's quite obvious that it's undones beforehand as the time skip itself never got to actually happen at all.

But yeah, as far as TWOH vs GER goes, it's all speculation. I doubt they intended it to have an explanation to begin with.