>>5598840>>5598870>>5598906Ok so this might be retarded but hear me out:
1) In book 15 of the Iliad Zeus gives Poseidon an ultimatum to stop helping the Greeks. While the latter relents he also that expresses resentment against him and claims that other Olympians share it: "But I will say this also, and make it a threat in my anger. If ever, acting apart from me and Athene the spoiler, apart from Hera and Hermes and the lord Hephaistos, he shall spare headlong Ilion, and shall not be willing to take it by storm, and bestow great victory on the Argives, let him be sure, there will be no more healing of our anger."
2)In spite of his earlier claims of being able to beat the rest of the Greek pantheon in a tug of war, Zeus expresses relief when Poseidon accedes to his demands. "In truth, this would have been a fight those other gods would have heard about, who gather to Kronos beneath us. Now this way it was far better for me, and for himself also, that, for all his vexation before, he gave way to my hands. We would have sweated before this business was finished."
While powerful Zeus isn't invincible and one other Olympian can contend with him, at least to an extent. Additionally since Hades, like Poseidon is Zeus's brother he can probably contend with him to a similar degree.
3) Thetis, being familiar with the powers of Olympians and Zeus in particular would therefore plan to instigate a rebellion, the Theomachy if you will, by exploiting the resentment from the Trojan war, in particular the deaths of demigods during it.
4)
That being said the Theomachy is still pretty unlikely to succeed due to Zeus's power alone, to say nothing of the Olympians that stay loyal to him. Therefore Thetis's main goal in instigating the Theomachy isn't to overthrow outright Zeus, it's to free Metis, Athena's mother and titan of wisdom, who, according to Hesoid's Theogony (which Homer stated is cannon in this quest >>5579750) Zeus tricked her into becoming a fly and swallowed because "Very wise children were destined to be born of her, first the maiden bright-eyed Tritogeneia (Athena), equal to her father in strength and in wise understanding; but afterwards she was to bear a son of overbearing spirit king of gods and men." and again later on "for fear that she might bring forth something stronger than his thunderbolt."
Thetis would then plan to get Metis pregnant again without Zeus realizing. Potentially via a combination of Metis's trickery and having Aphrodite to do what she did to Hera to Metis. As for getting Aphrodite to help, Thetis might have us kill Aeneas so she can pin the blame, albeit indirectly, on Zeus while hiding her own involvement in the matter.
Afterwards she can sit back and let fate work.Most of this was probably wrong but it was fun to theorize 