Originally Posted by
ZeroBG82
Only official explanation(s) so far is/are what was given in Clone Conspiracy itself. That dying so many times (27?-ish) drove Ben mad and/or that the clone degeneration affecting his new bodies did the same. BR:SS posited that dying repeatedly broke Ben's soul, and that just one more death and resurrection would blacken it completely, which is at least implied to mean that he will become a homocidal sociopath. A fate he suffered in BR:SS #25 and which has never been mentioned since.
The clone degeneration driving one mad is the same explanation given for Kaine's villainy, as once it was cured in Spider-Island he was much more mentally stable. But then still later, during his Scarlet Spider run, the degeneration was revealed to still be present, just held back by The Other. Once Kaine lost the Other the degeneration returned, but he seems unaffected by it mentally thus far. So not sure if that explanation still flies in any event.
Spider-Geddon wrote it off in Ben by having Ben sacrifice his life one more time, this time for the good of others, and then being revived a final time by Inheritor cloning tech, which is said to be explicitly better than the Jackals, and the new body "being reset to factory settings." Which has so far been unmentioned as well, but certainly seems to imply that Ben is back to his usual self and that his body is no longer degenerating. That's it. Just one line to put the toys back in the box. This potentially accounts for the degeneration explanation, but does nothing for healing Ben's mind.
To be frank, I think there is a story there if anybody wants to tell it someday. I think you could do it easily if you wanted to: Jackal tinkered with Ben's genetic makeup when he revived him the first time (following his death in SM#75). And with each subsequent death and resurrection whatever flaw Jackal introduced got worse and worse. The "blackening" that Death saw wasn't just a metaphysical death of Ben's soul, but an actual literal corruption of his body and mind. Now, you could either make this a Jackal screw up, or you could make it his evil plan. Maybe he's over-writing Ben's genome in some sinister way Superior Scarlet Spider style? Either way, the death and rebirth in BR:SS#25 is the tipping point, at which point Ben's true self is essentially overwritten almost completely. But Ben breaks through during Spider-Geddon, makes his last heroic sacrifice, and the Inheritor tech simply fixes whatever the flaw was and returns Ben to 100% pure Parker DNA. Purges whatever filth snuck in there, as it were. That's my head-canon for now, anyhow. We'll see if Beyond chooses to address any of the BR:SS or Spider-Geddon developments at all.