Hello I think I missing something about leadersThe only way to get named leaders back is with events, I do not think Caesar has such an event.
If my leader die in the first turn, the succesor will back in the winter phase, I have 2 question, If caesar die. will he never return as Caesar? and the second question If the succesor die. Will he return in the winter phase as a another succesor?
However, Rome has a capability that lets them execute SAs anywhere on the map IIRC, which to me makes up for not having a way to get Caesar back.
If you have the leader piece in your available forces (i.e. it is not currently on the map) you will get the successor on the map during the winter. See first bullet of 6.6
So yes, if the successor dies another one will be placed the next winter.