From the back of the box:
"The smash arcade hit now on the Super NES!
"Red Skull is back with a sinister mind-control device to control the most evil supervillains on earth against the forces of good. The supervillains want to control the universe!
"Captain America and the Avengers are the world's last hope in this battle against evil. Join Cap, Iron Man, Hawkeye and Vision as they combine their special powers your skills in a last ditch effort to defeat Red Skull and his evil henchmen. Succeed, and you're a hero. Fail, and we'll revoke your Avengers security clearance!
"Captain America and the Avengers brings you:
Stunning graphics, sounds and arcade effects starring Earth's mightiest heroes!
Intense gameplay action straight from the #1 arcade hit!
Five massive levels of action, with bonus lives and special power-ups!
Villains you love to hate, like Whirlwind, Ultron, Grim Reaper, Crossbones and more!
One and Two player options, with Two player simultaneous head-to-head mode play!"