What was Mewtwo's endgame?

[MarshiyanMisutaa]

1. "Who am I?"
2. Kill your creators.
3. Serve Giovanni, escape from Giovanni.
4. Invite and challenge powerful trainers.
5. Steal and clone their pokemon.
6. Copies vs Originals.
7. ???
8. Profit?

 

[Silktree]

The "purge this planet of all who oppose me" part is dub-only.

The Japanese line here (だからこれは、攻撃でもなく宣戦布告でもなく・・・！私を生み出したお前達への、逆襲だ) is one that is quoted very often among Japanese fans. It all translates to "But this is neither an attack nor a declaration of war...! Against all of you who brought me into this world, I will...strike back."

In the Japanese version, Mewtwo simply wanted to prove the merit of his existence as a separate being from humans and his ancestor, Mew. There is no "???" in your timeline.

What ended up happening is that Mewtwo learned that Pokemon and most humans are not his enemies. If Mewtwo had won the battle, then he probably would have sent the trainers back to send a warning to the rest of the world.