Board Thread:Antaeus' Arena: Audience Chamber/@comment-4531192-20140214172547/@comment-6326997-20140216063308

From a mostly unbiased standpoint (since I haven't read any of the Percy Jackson Books personally) this is my idea of what would go down.

The King of the Gods is not someone you want to mess with, he is not just stronger, but he is also a bit wiser than Poseidon. Regardless of what many say, it was Zeus who rescued the others from the belly of Kronos, and while one can argue that it was unfair since he wasn't swallowed, to stand up to Kronos is no small feat in itself.

Anywho that was just a sidenote, on to the real battle.

Powers and Abilities

Now this is widely disputed as to who is actually stronger. And while Poseidon's powers are formidable and definitely more numerous than those of Zeus in terms of outright strength, Zeus was considered the strongest (Beside his son Hercules) in a physical sense. His strength was such that in Poptropica (Another unrelated game but I just wanted to note what other writers and game developers think of Zeus) the player had to go and retrieve the Trident of Poseidon AND the Hades' Helm of Darkness in order to be a match for Zeus because of his power being so much greater. I don't remember where I read it, but I believe that all three of the Big Three split Earth's domain between themselves but I am unsure of their divisive measures and so they will be un-noted.

Children are not Direct Mirrors of their Parents!

Now while children gain traits and abilities from their parents, a child of Poseidon (Percy) could be stronger than a child of Zeus (Jason). This is simply how they grow and use their abilities, "A man with a Shuriken could be no match for a Master with a pebble." Or "It is not the size of the dog in the fight, but the size of the fight in the dog." A person can have all the abilities in the world and still lose to one person who only has one meager ability which they have mastered completely. In a Z vs P battle why does Percy and Jason even have a say anyways?

Clincher 

And so the battle begins, it has been said by many writers that the Big Three are unable to fight each other directly, rather they cannot steal one's Symbols from one another. And in other places it has been said that not only can they not steal from one another, their weapons are ineffective against another's symbol, ergo the Trident cannot best the Bolt alone, and vice versa and the same with the Helm. So their weapons are Moot. This leaves raw ability and pure strength, in which case Zeus has been stated to be physically (and hinted at) mentally superior to his brother Poseidon (though I believe Hades is the smartest of them all).

In summary

This battle is unlikely but seeing the facts, I think Zeus wins regardless of all that Poseidon controls. I have no reason to believe that the weapons they wield are effective if both are using said weapons in battle, and I also don't see how a Shark can do anything against a god. The complete control of Air could render a Hurricane obsolete as Hurricanes are the fusion of Air and Water (in a sense). Thus that would leave Water vs Lightning, with Lightning being greater than Water because water is a conductor of electricity. And in arm wrestling, Poseidon just can't best his younger brother who's arm is way to muscular.

I hope I didn't step on too many toes.

But in my ideal

Power wise: Zeus > Poseidon > Hades

Mentally: Hades > Poseidon =/< Zeus

"There is a Reason a King is Chosen, and the Chosen One became King."