If there were no Thanos in the Avengers storyline, key events from the Marvel Cinematic Universe (MCU) Infinity Saga would be drastically different. Thanos is the central antagonist in “Avengers: Infinity War” and “Avengers: Endgame,” where his main goal was to collect the six Infinity Stones and use them to wipe out half of all life in the universe to stabilize overpopulation and resource scarcity. Without Thanos:
- The catastrophic “Snap,” where half of all life disintegrated, would never have occurred, so the universe and Earth would avoid the massive loss and trauma known as the Blip.
- The Avengers would not have had to unite for the time-travel mission in “Endgame” to undo the Snap, meaning no epic final battle against Thanos from 2014’s timeline.
- The overall plot regarding the searching and battling for the Infinity Stones would be absent, affecting the arcs of many characters.
- Some teams such as the Guardians of the Galaxy might never have formed because Thanos’ actions influenced their origins.
- Without the Snap to catalyze the unification and growth of the Avengers and other heroes, the MCU storyline would likely have unfolded in a less dramatic and more fragmented manner.
In short, the absence of Thanos would mean no universe-wide existential threat, no decimation of life, no major Avengers time travel and reversal mission, and a very different MCU story progression, with many conflicts and character developments either not happening or unfolding differently.