Rumours that the artist would produce more work for the publisher were started when Brian Michael Bendis posted an image of the cover to New Avengers #1 on Twitter.
"Whatever happened to this guy? Marvel NOW! now?" he wrote.
When asked if he was referring to his former collaborator on the Avengers franchise, Bendis clarified his statement, saying that he was referring to "the mystery bubbleheaded person".
It had widely been assumed that the character that appeared on the cover of the 2005 comic was an early design for Ronin.
Finch is currently working on the ongoing Batman: The Dark Knight title for DC Comics.
The Marvel NOW! initiative will launch out of the conclusion of Avengers Vs. X-Men, with creative shakeups on many of the publisher's major titles.