It could mean that a character or someone from My Hero Academia (MHA) is observing or reading Marvel Cinematic Universe (MCU) fan - created fictional stories. Maybe it's for inspiration, or just out of curiosity about different superhero concepts.
It might be a really strange or unique concept. Maybe in some sort of meta - story, MHA characters are fans of the MCU in their own world and they watch MCU fanfiction to pass the time. It could also be a creative way for fans to mash - up the two universes. For instance, they could imagine how Deku from MHA would interact with Iron Man if he read a fanfiction about it. It could open up all sorts of creative scenarios where the rules and characters from both universes collide and interact in new and unexpected ways.
Well, if we think about it, perhaps it's a fun crossover idea in someone's imagination. The MHA universe has its own set of heroes and villains, and the MCU has a vast and different set. When MHA watches MCU fanfiction, it might be like exploring a whole new world of superhero storytelling. It could also lead to some interesting comparisons between the two universes, like how the powers are different, or how the characters deal with various situations. For example, in MHA, the powers are called 'quirks' and are more individual - based, while in the MCU, there are different sources of power like the Infinity Stones. So, seeing how an MHA character might react to the complex power dynamics in MCU fanfiction could be really fascinating.