Prowl

When two of pop culture's mightiest universes collided in 2007, Prowl was right there at the flashpoint. Debuting in Marvel's Modern Age crossover New Avengers / Transformers #1 — crafted by Stuart Moore and Tyler Kirkham — this Transformer shares the page with heavy hitters on both sides of the divide, from Optimus Prime and Bumblebee to none other than Captain America himself. It's a compact but electric corner of comics history, and for fans who love the moment Marvel's heroes and the Autobots occupied the same panels, Prowl is a compelling piece of that rare, crossover-era puzzle.