This game remains my favorite supers role-playing game. Not because of the license or art or anything superficial. The Cortex Heroic system is solidly designed and simple to create virtually any super-powered character (in one expansion, Howard the Duck gets an official write-up).
Even if you've moved on and already purchased Cortex Prime, using MHR as a guidepost for creating a new edition of Cortex Heroic is a great idea.
The sheer number of character datafiles make it easy to figure out how to make your own characters. Reskinning Spider-Man, Captain Marvel, Captain America, Hawkeye, Monica Rambeau, Super Skrull, Venom, Rogue, or even Squirrel Girl to fit a character concept can be done in a flash.