Ironheart: Bad Chemistry #1

History

Marvel announced the one-shot in January 2025, positioning it as a direct continuation of writer John Jennings's earlier Ironheart work. Jennings — a Hugo Award winner for his Parable of the Sower graphic novel adaptation and an Eisner Award winner for his Kindred adaptation — stated publicly that when Marvel asked him to revisit the character and expand the Khem rivalry, he was eager to explore Khem's background and motivations in depth. The book was paired with interior art by Jethro Morales, cover art by Eder Messias, and variant covers by Paris Alleyne (Khem's co-creator) and the artist known as Godtail, and it was placed on the April 2, 2025 release date to align with advance promotional activity for the Disney+ Ironheart series.

Trivia · 8 facts

• Published April 2, 2025 (cover-dated June 2025) by Marvel Comics as a standalone one-shot; written by John Jennings with interior art by Jethro Morales and a main cover by Eder Messias.
• Khem (Kimberlee Kennedy) — the alchemy-powered villain first introduced by Jennings and artist Paris Alleyne in Free Comic Book Day: Marvel's Voices #1 (2023) — returns as the primary antagonist; this issue reveals her origin and her familial connection to the Chemistro legacy.
• The story establishes that Khem is the illegitimate daughter of Curtis Carr, the original Chemistro, whose first appearance was in Luke Cage, Hero for Hire #12 (1973), created by Steve Englehart and George Tuska.
• Calvin Carr — Curtis's younger brother and the third Chemistro, who first appeared in Power Man and Iron Fist #93, created by Kurt Busiek — also appears, with the story revealing his role in shaping Khem's criminal career.
• Basil Sandhurst, the Controller — a classic Iron Man villain first introduced in Iron Man #12 (1969) by Archie Goodwin and George Tuska — appears as the secondary antagonist pulling Khem's strings, marking a notable crossover of Iron Man-adjacent villains into the Ironheart corner of the Marvel universe.
• The plot centers on Khem stealing the Philosopher's Stone (a Marvel artifact previously associated with the Fantastic Four via Diablo) from the DuSable Black History Museum in Chicago in order to power up an alchemical elixir, with the Controller providing strategic backing.
• Riri's onboard AI companion, referred to as N.A.T.A.L.I.E. (Neuro-Autonomous Technical Assistant & Laboratory Intelligence Entity), plays a significant role in the resolution, establishing the character's personality and dynamic with Riri as a running feature of this creative era.
• John Jennings is a Hugo and Eisner Award-winning creator best known outside of Marvel for his graphic novel adaptations of Octavia E. Butler's Kindred and Parable of the Sower; Bad Chemistry #1 represents his most substantial Marvel superhero work to date.

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