I hate to say it, but D'Argo has to stay dead. To bring him back would be horrible. Yes, it'd be great to have the big guy back, but it wouldn't be the same.
In order for the deaths to have any kind of impact or meaning, they have to stay dead.
It'd end up being like Superman dying and then coming back. Dead heroes don't seem to stay dead in Sci-Fi or in Comics. Aside from Zhaan staying "dead" . . . I only know of one other core character who stayed dead after they were killed off, Chewbacca.
Heroes die . . . let them retain their "blaze of glory."
