Stan Lee was a random event.
In the event, the player received Big Goomba Crusher and 6 turns of the Brawler's Brew Buff.
You bump into Stan Lee. He gives you a smile and says:
"We all want to be superheroes. We all want to do more than we can. I guess it's finally time for me to become more than I am..."
You want to tell him that he's a superhero to millions of people already, but suddenly all you see is a bright smoke. It's as if he evaporated.
But you feel stronger... meaner! You just want to... SMASH!
[Rest well, Stan]