Sometime after Kaine's escape from the feds, Peter receives a message from one Ezekiel Sims, the supposed head of the Scriers shell corporation WebCorps and the source donor of the genetic basis for Oz. The message instructed Peter to come to the warehouse where Peter had defeated Tarantula, and to come alone. Peter is cautious, but goes anyway. There, he finally meets the evasive Sims--but the well dressed man with the cane and red eyes informs him of what Peter and Osborn had already figured out--there was no "Ezekiel Sims," that was merely a pseudonym that this man used in his dealings with the Scriers. His real name, according to him, was Morlun. And with the Scriers now out of the picture, Morlun speaks frankly with Peter about his role in everything.
He explains that he is an Inheritor, a line of superhumans that has existed unbroken since ancient times--their power passed from person to person by different methods each time (a totem of sorts). Morlun's Inheritor abilities have given him absolutely tremendous strength and a greatly extended lifespan, allowing him to amass a large amount of power and wealth. But all of this power has finally started to take its toll on Morlun's body--while his power is still unmatched, his body is dying. He had been secretly selling his "perfect DNA" to be used as the genetic base for superhuman serums for decades, with Oz the only one to be a remote success. And while his duty as Inheritor requires that he passes his abilities down to a new Inheritor, Morlun's scheme with the Oz had a more sinister motivation: he had grown to like his long life too much and was not willing to pass on without a fight. Convinced he was on the cusp of true eternal life, Morlun waited for the Oz formula to create the next true Inheritor. The random luck that was the spider bite that bit Peter somehow created what Morlun had been waiting for. He would use Peter's blood as means to create true eternal life for himself. If Peter died in the process, so be it; he would have another spider be created.
Morlun gives Peter an ultimatum--submit, or be hunted down like an animal.
Terrified, Peter contacts the federal agents who had been working with his clones and Madame Web. Curious as to why Morlun didn't just harvest the clones the Scriers had been making, they agree to meet Morlun--they being Peter, the Scarlet Spider, and a slew of federal agents. They meet him the next night in the same warehouse, and state his decision to fight back. Morlun responds by attacking with frighteningly inhuman speed and ferocity, the likes of which he had never seen. Within seconds the federal agents are slaughtered, and Peter and the Scarlet Spider are on the run, fighting for their lives.
The fight leads to the heart of the city, leaving destruction in its wake, the remaining federal agents struggling to keep up. In the midst of the fight another spider person dressed in the same costume as Peter appears to help out, but the three spider people are no match for Morlun. He manages to down one of the two men dressed as Spider-man, and Morlun draws a knife across the spider man's chest. He tastes the blood, but for the first time in the fight, Morlun reacts negatively. The downed spider man manages to remove his mask, and reveals the hideous visage of Kaine. Morlun reacts in a horrified manner, and his skin starts turning ash grey. Kaine manages to get to his feet and strike Morlun, causing him to actually bleed, his blood even turning a sickly grey color. Something about Kaine's blood wasn't agreeing with him. Taking no chances, the federal agents watching from distant helicopters open fire on Morlun, and he is struck several times in the chest. Morlun falls to the ground, and the Inheritor dies.
In the aftermath Kaine flees once again before Peter and the Scarlet Spider can thank him. Upon gazing into Morlun's glazed over eyes, they surmise that the symbiote basis used to create the clones had rendered the clones' blood incompatible with Morlun's, so in a way Peter's father's research had ultimately saved the day, in a very roundabout way.
So a large chapter is closed on the mysteries surrounding Peter's life, for now, but of course the adventure goes on.
The tl;dr version is this: Morlun is the true original source of the superhuman serum that made Peter the way he was, and Morlun wanted Peter's blood to keep himself alive for longer. Peter said no, and Morlun tried to kill him for it. Kaine's blood ends up saving the day? Sorry, that was all pretty long up there.
But yeah okay, that's Morlun. A lot of words for what seems to be just some guy in a suit. I kinda like the dichotomy of Morlun and Spider-man--a well dressed vampire guy hunting down a guy in a lucha mask and tights. But the Victorian fashion Morlun wears in the original comics had to go, didn't fit at all with the look I'm going for in my universe. His look here is actually pretty directly inspired from Loki's suit he wears briefly in the first Avengers movie. Suave and well put together but still quite threatening looking. I wanted him to look really cold and calculating, but also like he's hiding a really ferocious beast just underneath the surface.
He was a hard one to pin down, though, as, like I said, I like the *idea* of Morlun, but the mysticism to the whole Spider Totem always bugged me as really out of character for Spider-man's cast of characters. So it took me a while to come up with a means for him to be a similar force without using a true "Spider Totem" in the mythology.