Optimus Prime

Few crossover events dare to bring together the mightiest heroes of two universes, but when Stuart Moore and Tyler Kirkham launched New Avengers / Transformers in 2007, Optimus Prime stepped into Marvel territory with all the gravitas you'd expect from one of comics' most iconic figures. This Modern Age Marvel appearance finds the legendary Autobot leader sharing the page with heavy hitters like Captain America alongside fellow Transformers Bumblebee, Wheeljack, Ratchet, and Runamuck — a collision of worlds that makes for genuinely thrilling reading. With only four catalog appearances, this is a rare, concentrated slice of Optimus Prime in the Marvel universe, making each issue a collectors' gem worth tracking down.