Given whats being set up here, its starting to make sense how the God Valley incident even starts:
- The WG is there because of whatever Garling found (Uranus or some other weapon/object). The fact that Saturn is here supports that its something major
- At some point Shakky is kidnapped. This still needs to happen as shes the treasure of Pirate Island. It was implied last chapter that one of the Rocks pirates (Kyou) is a traitor, possibly a marine spy like people are guessing..
- Presumably Rocks goes there for the same reason as the WG. Whitebeards dialogue seems to imply this: "We gotta confirm it's here first"
- The rest of his crew want various things. Kaido and BM want DFs
- Roger clearly came because he's a Shakky simp lol, thats all. Gaban's dialogue strongly implies that
- Garp shows up because of Roger
So yes, several things are happening and there are multiple goals between each of the factions involved.