if anything will be highlighted of Conquerors it was non other than Kid, law will die after this war, he will give his life to luffy, we know why oda gave law a df that can make someone immortal in exchange for his life, because of that i also believe his df can bring someone back to life, in exchange for him, minus the immortality, because that thing only works on a living person.
why do i belive that, because luffy is an mc of one of classical reknown shonen, most of mc in legendary anime have those scenario when the mc died, yusuke goku, even gon and we know how oda admire some of those classic. its tradition in, probably to show a certain character that he was like the second coming of jesus sort of, where the MC should die and ressurected again for him to trancend to a new path. the chosen one.