Future Events Will the other Elders follow Saturn's example and also leave the Holy Land before the final battle commences?

#1
It looks like Saturn is going down. The other elders could draw the lesson from it that they should stay where it is safe. On the other hand, they might not have a choice. Saturn went to Egghead because he is responsible for science. So Venus could be send if in a future arc there is a problem with tribute payments for example. Could Oda kill them off before the Strawhats come for Imu? So Imu's commanders in the final battle would merely be the Holy Knights.
 
#3
You want them to fight in the castle? Only turbo weaklets can have a serious fight inside of a building, anyone strong enough to fight them has to be far stronger than hallway level.
 
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