Before the series started, there were two main candidates for the new Moon Knight (who I like to call MK2.0): Zodiac and a "brought-back wrong" Marc.
But now that we've seen him in action, I am 99% certain he is someone else. Let's look at the evidence we have so far:
- He can think rationally & tactically (that pepper thing is not something a raging berserker would think of.)
- He sees his crusade as a holy mission, almost an obsession.
- His face is somehow shocking, so he doesn't want to reveal it.
- He can fight in a cape. Not a big fact, but a notable one.
- And, most notably, he has Darkforce powers. But we know from the Blood Hunt preview who he isn't...
Add all these elements together, and one candidate jumps to the top of the list:
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Maximillian Coleridge, a.k.a. the Shroud.
Further thoughts:
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The fact that he has a history with Marc & Greer from the WCA days is added evidence.
Jed even stuck him in the background of an early issue.
I suspect that Zodiac may still be involved, either through brainwashing or some sort of extortion.