Summary While it may be a while before Invincible returns for season 3, its next story is already clear, but one other superhero show is already exploring this narrative, and it's airing right now. Invincible season 2's ending showcased Mark defeating Angstrom Levy and permanently changing in the process. Mark's brutal beatdown seemingly killed the villain and set up a darker future, making his impending battle with the Viltrumites even more difficult.
This storyline has been one of the show's best and makes up for Superman's recent live-action disappointments, but the arc feels very similar to Invincible's Viltrumite plot. Omni-Man trying to manipulate Mark into conquering Earth feels similar to what Brainiac is doing with Clark and Kara. Both shows have protagonists who have ties to alien species that want to conquer Earth, giving these stories similar vibes.
The next season looks like it will continue to be violent, and with some controversial storylines potentially on the horizon, Invincible season 3's war could be fought both physically and mentally.