Ratchet

When two of pop culture's mightiest franchises collided in 2007, Ratchet was right there in the thick of it. Debuting in Marvel's New Avengers / Transformers #1 — a Modern Age crossover event crafted by Stuart Moore and Tyler Kirkham — this character shares the page with titans like Optimus Prime, Bumblebee, Captain America, and Wheeljack, which tells you everything about the extraordinary company they keep. It's a small but undeniably electric corner of the Marvel catalog, where superhero and Transformers mythology crash together in genuinely thrilling fashion. If you love the idea of two beloved universes occupying the same story space, Ratchet's appearances are well worth tracking down.