Earth's Mightiest Heroes lasted only two seasons despite boasting a 100% on Rotten Tomatoes. Here's what happened.

but Ultron and Doctor Octopus have also led their own versions. We've seen Earth's Mightiest Heroes fend off aliens and cyborgs, so a battle with some good old-fashioned supervillains from ...

And as such, they have the potential to outnumber and outpower Earth's Mightiest Heroes. At least according to McAvoy himself. Disney+: from $9.99 a month w/ ad-supported plan The MCU and X-Men ...

Tony Stark creates the Ultron Program to protect the world ... try and defeat a virtually impossible enemy together. Earth's mightiest heroes must come together once again to protect the world ...