Dr. Sal Kennedy

Dr. Sal Kennedy stepped into the Marvel universe in 2007, debuting in Iron Man #15 courtesy of the Knauf brothers and Roberto de la Torre during a gritty, espionage-tinged Modern Age chapter of Tony Stark's world. It's rarefied air to share pages with the likes of Tony Stark, Maya Hansen, Dum Dum Dugan, and the Mandarin, and that's exactly the high-stakes corner of Marvel where Kennedy operates. With only a handful of catalog appearances, this is a deep-cut character for the dedicated Iron Man devotee — the kind of discovery that rewards fans who dig past the headlines.