What is there hidden? just wondering since we know roger gets tenryubi? (kinda hard to know since is the son of God Knight or soon to be Elder) shanks from it so probably hidden in a treasure chest by Dragon, rocks probably killed in power struggle between big mom and kaido or killed by both or other, shiki is trapped by government, big mom, shirohige and kaido escape, roger attacking mary geoise doesn't happen until years later when oden joined his crew (freeing lot of slaves, unknown if he freed fishmen tiger there thus helping create the sun pirates or was joined by sun pirates during the attack and helped freeing boa hancock then which would make her quite old around 32 to 34 years not weird since could have been a request from gloriosa and shakky) well during the god valley incident is when garp became known as a hero after hearing roger and the others were there joining the fray.
the whole member of davy clan also don't make much sense seeing how dragon is there, we know kuma saved dozens using the fruit there, we know shamrock will become God Knight so he is kept by his dad, shakky ends up on sabbody opening her bar, we know roger assaulted Mary Geoise before he died freeing slaves (so is unknown what will happen to shakky either freed up there or later).
Well as corazon said "some that carry the D. in their names are because they are known as god natural enemies" yet we haven't seen rocks acting in defiance of tenryubi and going mostly against other pirates (kinda like imu) yet most has already been mentioned overall, then years later the world government stole the sun god nika fruit from elbaf, for some weird coincidence shanks was there as well so he took advantage of the attack that was blamed on loki and followed the navy gunship to steal the gomu gomu no mi (or so was named) that was eaten by luffy as guided by destiny or the will of D.