Young Hellboy: Thrilling Sky Adventures #4 is set to bring its four-issue adventure to a close on October 21, 2026. The final chapter centers on the mystery of Devil’s Plateau, where Scarlett learns that the force lurking at the location may not be the greatest danger after all. The sharper concern, the setup suggests, is what the crew—including Scarlett herself—could become.

That is a strong final-issue hook for a Young Hellboy story: an outward expedition and supernatural-looking mystery that turns inward at the finish line. There is still an ominous location, still a threat to uncover, and presumably still enough adventure momentum to justify the series title’s “Thrilling Sky Adventures” promise. But the advertised tension is character-based. Devil’s Plateau may provide the strange machinery and hidden truth; Scarlett and the team appear to be where the real stakes land.

A finale built around the team, not just the plateau

The official premise keeps the specifics deliberately close to the chest. Scarlett discovers the truth about Devil’s Plateau, but it does not spell out exactly what lives there, what it wants, or why the group is in danger. That restraint matters in a concluding issue. Rather than giving away the puzzle’s answer before readers open the book, it frames the ending around consequence: revelation alone is not necessarily the problem. The response to it could be.

In straightforward terms, Devil’s Plateau is the story’s external mystery—the place, phenomenon, or menace the characters have been trying to understand. The team’s possible transformation is the internal mystery. The latter question is more personal: what does contact with this danger do to the people who thought they were investigating or confronting it?

That distinction gives issue #4 an appealingly pulpy shape without requiring a spoiler-heavy description. Readers can reasonably expect answers about the plateau, while the wording also points to a climax where the characters must reckon with their own capacity for danger. A monster can be punched, outrun, contained, or escaped. A change in the people standing beside you is usually messier—especially when one of those people is Scarlett.

The creative team returns for the wrap-up

The finale reunites Mike Mignola, Tom Sniegoski, Craig Rousseau, and Chris O’Halloran. Mignola and Thomas Sniegoski are credited on the issue alongside Rousseau and O’Halloran, while Rousseau also provides the main cover.

The issue is described as an action-adventure series finale, a useful label for readers deciding whether to jump in at the end or catch up first. A “series finale” means this is the closing installment of this particular miniseries, not merely the end of a storyline within a continuing run. With Devil’s Plateau’s secret positioned as the book’s central payoff, #4 is designed to resolve the immediate adventure rather than leave that question hanging for a later issue.

There is also a Cover B variant by Ben Stenbeck. In comics distribution language, a variant is an alternate cover edition of the same comic issue. The interior story and page count are not presented as different here; the distinguishing feature is the cover art. For readers who simply want the conclusion, either listed edition serves that purpose. For cover-focused collectors, the choice comes down to which interpretation they prefer.

What readers should know before release

  • Title: Young Hellboy: Thrilling Sky Adventures #4
  • Publisher: Dark Horse Comics
  • On-sale date: October 21, 2026
  • Format: 32-page comic book
  • Rating: T
  • U.S. price: $4.99
  • Canadian price: $6.99 for the listed Cover B edition
  • Main cover: Craig Rousseau
  • Cover B: Ben Stenbeck

The “T” rating indicates material aimed at teen readers. Beyond that designation, the available listing does not detail the precise content behind the rating, so it is best read as an audience recommendation rather than a promise of any one particular horror or action level.

At 32 pages and $4.99, the issue follows the familiar single-issue comic format: a compact physical chapter built for a focused reading session, with the conclusion carrying the responsibility of closing the Devil’s Plateau plot and the team’s personal crisis. The listing identifies two cover options but does not establish a difference in story content between them.

Why the setup has some bite

“The real danger is us” can be a broad genre idea, but the Devil’s Plateau premise puts a useful twist on it. The issue does not merely suggest that the characters are flawed or frightened. It specifically presents the unknown force at the plateau as potentially less perilous than what the team could become. That is a high bar, and it invites a finale where the answer to the mystery alters the meaning of the adventure that came before.

The available material also points to peculiar ancient machinery connected to Professor Somber. Ancient machinery is an effective visual shorthand in a supernatural adventure: it implies a past that remains active, an artifact or mechanism whose purpose has not been fully understood, and a problem that may be triggered rather than simply encountered. Still, the exact role of that machinery has not been established in the published setup. It should be treated as an intriguing clue, not a confirmed explanation for Devil’s Plateau.

For Hellboy readers, the “Young Hellboy” label also establishes a different dramatic lens from a veteran monster-hunter story. The supplied material does not lay out every character’s history or the series’ wider continuity, but the title itself puts youth and formation in the foreground. That makes the finale’s concern over what the group could become especially fitting. The central threat is not only immediate survival; it is the possibility that an adventure leaves a permanent mark.

Practical takeaway for comic readers

Readers following the miniseries will want #4 for the direct resolution to Devil’s Plateau. Readers considering the book solely from its finale solicitation should note that it is presented as the endpoint of an ongoing four-part adventure, so the emotional and mystery payoff will likely be clearest with the preceding issues in hand.

Those picking between covers can keep the decision simple. Rousseau’s standard cover is the main edition listed for the issue, while Stenbeck’s Cover B offers an alternate visual option at the same stated U.S. price. Nothing in the available issue information indicates an exclusive story, bonus pages, or a different ending in the variant. It is cover choice, not a branching-path finale—no need to treat the comic rack like a dialogue wheel with irreversible consequences.

Young Hellboy: Thrilling Sky Adventures #4 arrives amid a wider stream of familiar names returning in new pop-culture projects; for a different example of that legacy-project energy, see the update on Mel Brooks and Spaceballs: The New One.

For this Young Hellboy finale, though, the focus is much tighter: Devil’s Plateau has an answer, Scarlett is the person who finds it, and the threat may ultimately sit closer to the heroes than the shadows at the edge of the map. That is a solid premise for a final issue—one hand on the adventure serial controls, the other hovering uneasily over the big red button marked “what have we become?”