Copy to clipboard Jonathan Majors' Kang The Conqueror is officially in the Marvel Cinematic Universe, and while we got just a taste of what he's like in Ant-Man And The Wasp: Quantamania. Honestly, it's likely we'll see a whole lot more of him after that, so perhaps it's best to lay out just how dangerous this villain is since looks can be deceiving. Kang may look like a substantially weaker MCU big bad than Thanos, but his command over time has allowed him to do some pretty horrific things throughout the history of Marvel Comics. It's hard to really top erasing half of existence, though there are a few things on this list I'd argue are just a little bit worse in the grand scheme of things.