The "Deadliest Hulk in Marvel history" gets a name, a face, and a surprising origin

gamesradar.com:

Update:  Writer Donny Cates and artist Ryan Stegman have been gearing up to introduce a new villain billed as the "deadliest Hulk in Marvel history" in April's Hulk #6 (read more about that below), and now we know a bit more about who the new Hulk, known as 'Titan', actually is.

And as it turns out, Titan seems to be the Hulk himself, undergoing a new and terrible evolution.

In Cates and Stegman's Hulk run, Bruce Banner has separated his physical body from the Hulk, piloting the not-so-jolly green giant's body on a cosmic mission in space. 

But in Hulk #6, Banner's connection to Hulk "slips," allowing the consciousness of "something much worse" to gain control of Hulk's body - apparently evolving him into the twisted new Titan form shown in slightly more detail on a new variant cover from Stegman himself.

While Stegman's main cover, seen below, shows Hulk trying to hold Titan's massive fist from crushing him (likely a metaphorical image), his variant cover, oddly dubbed a 'Teaser Variant' by Marvel, shows Bruce Banner transforming into Hulk, and Hulk then transforming into Titan, whose shrieking face is shown in extreme close up in the third panel of the cover, seen above.

"The heroes of the Marvel Universe may think Hulk is the problem, but he's not - this is the problem," says editor Wil Moss in Marvel's reveal of the variant cover. "And after Hulk #6, there's no stopping it…"

So what's the thing that's gonna take over Hulk's body, turning him into the Titan? We won't know till Hulk #6 arrives on April 20, though Moss may have offered some clue in the initial announcement of the story, saying the new villain is "basically Hulk's Knull," referring to the former 'God of Symbiotes' who Cates and Stegman created as the