Alien invasion? Luckily, I'm Superman.

At the awards ceremony, a reporter shoved a microphone in front of Su Mo. "Mr. Superman, what are your thoughts on the top-prize essay, 'Grandpa Superman Smashes an Alien Warship with His Fists'?" "Hmm, very good, uh, very emotionally charged." Su Mo was somewhat speechless. It made it seem like the essay won because of flattery, when it was clearly excellent on its own! ... "Earth has finally found a place in the universe." Superman, Level 10 Scientist, Vice President of the Earth Federation (Stars), Honorary Vice Director of the Global Defense Agency (Invincible Young Hero), one of the giants of the Justice League (DC), one of the founding members of the Avengers (Marvel)—Su Mo thought with some emotion. He glanced at the report in his hand, "Damn it, didn't I say not to round the cosmological constant π yet?!"... "Homelander is too weak." "Holy crap, Black Death Emperor? Thank goodness for the white light! What? Is it a fragment of the FVV Dark Multiverse Existence Spirit?" "What? Why is Omnipotent Man fighting his own son and getting humiliated, young hero?" "So you're Thanos, huh! You're so arrogant, you purple potato." "Hey hey hey, Batman, I was just hallucinating, I saw you as the Joker! What? You're the Batman Who Laughs?!" "Holy crap, Marvel's Infinite Universe Battle Royale? How come even the Asgardians are here? Luckily, I've taken down Dr. Manhattan's quantum power, a little bit of Asgard, nothing to worry about!" This work stitches together elements from Star Trek, Black Robe, DC, Invincible Young Hero, and possibly Marvel, and other American comics.