Since One Piece Chapter 957, "Ultimate," fans have been eager to hear more about the God Valley Incident. This mysterious event involved Gold Roger and Vice Admiral Garp teaming up to beat Rocks D Xebec and his crew of future pirate legends. Such a gathering of these individuals in their prime (plus one dark horse in the form of Xebec) promises to be one of the most exciting points in the series' history. When Chapter 1095, "Better Off Dead in This World," took fans to this fateful island in the form of a Bartholomew Kuma flashback, many were ready to see this clash for the ages unfold.
Source:https://www.cbr.com/one-piece-1096-god-valley-skip/