Speaking to Entertainment Weekly, Mignola revealed that "Hellboy in Hell" wasn't originally planned as an overarching finale for the character: "I thought it would just be these odd little rambling stories. And then I did certain things in the book that I didn't think would be a big deal, but they kind of turned into a big deal. And somehow, the dominoes started falling and I realized it's not a bunch of unrelated stories. It's one big story."
Mignola went on to say how, at first, he wrapped up the story in issue 8, before deciding that 10 issues was the proper way of ending "Hellboy's" tale: I got to the end of issue eight and the last page of that issue, he's sitting under at tree and I just went, oh, that looks like the end. I wrote the end on it, and I just went, oh no, that really does look like the end. I had all this other stuff I wanted to do, and it just felt like stretching out something that wasn't quite done at that point, but I really saw I had done everything I wanted to do with this particular story.
He added, "So I replotted a lot of stuff. Issue nine we have this nice conversation with his ex-wife and issue 10 was, here's the ending that we wanted to do."
Touching on the possibility of working on "Hellboy" again, Mignola said, "He's been dead for a long time. It's really hard to ever say something is completely over when the character has already been killed and continues to walk around. So while this story is done and I have no concrete plans to do any other Hellboy stuff myself, it does end in a pretty interesting way."
As for the affect of the series on the rest of the "Mignolaverse" titles, like "B.P.R.D.," going forward, Mignola said, "I suspect it will mean very little to the outside world because the 'Hellboy In Hell' stuff has been coming out so slowly, I don't think people will notice when it stops. Fortunately, we had already come up with the idea of doing this series, 'Hellboy and the B.P.R.D.,' so we had done a couple books about the B.P.R.D. when Hellboy was just a baby and then we thought it would be natural to come off of that and pick up Hellboy's years when he was an agent. I got the ball rolling on that series and I still have a hand in that series working with Chris Roberson. Hopefully, that stays up and running."
"Hellboy In Hell" #9 hits stands on May 4.