[Western Crossover] An Invasion in Theory

The first time Kasbo, a multiverse marauder, invaded Earth, all he saw was a desolate wasteland. He had no choice but to return empty-handed with his fleet. The second time he invaded Earth, this weak little planet seemed ripe for the taking, until some tiny red-and-gold bug sent a nuclear bomb that blew up his mothership. The third time he invaded Earth, a human hailed as the God of Earth (?) stood before the fleet with his team and said one word: "Leave." This time, after decades of careful planning, he led his fleet to invade Earth again, only to discover that three universes had fused together. QAQ Once he escapes from this human prison, he'll throw the scientific officer who calculated that an invasion was "theoretically possible" into the rift between universes! For now... The Human Alliance's interpreter looks at the bristling alien creature inside the highest-security interrogation room, then glances at the grim-faced superior beside them. Tentatively, they try speaking the alien's language: "...Meow?" *Unless something unexpected happens, the pairing will be Iron Man. Theme: What bad intentions could a little kitty possibly have?