Mary geoise' treasure

What is the treasure of Mary geoise holy land and how it is related to Imu sama..

We saw in the latest chapter (1155) that Rocks probably understood what was the secret hidden in the Holy Land of Mary geoise. The strongest and most dangerous pirate of his era just penetrated by force the holy land of MGeoise because he wanted to put his hands onto something or someone very strong/valuable.

And this individium is Imu-Sama. Rocks offered the head of 5 Kings in exchange for Imu, (for what reasons..? We don't really know), but Imu refuses and explain that the head of 5 Kings are not to be considered enough as an exchange tokken for Imu's existence.

For me, it means that either Rocks understood unconsciously what was Imu's real power/identity and how it could bring Chaos, combined to Rocks abilities. or, it means Imu holds the power of a devil fruit/of creation that goes beyond Rock's and so he understood that he couldn't handle it right now. This is why he would have to come back later.

I have some guesses that i want to share here : Imu's power might be..

I. And old magical wisdom, a knowledge so powerful, that only one person can hold it, possess it at a time, in an existence and Imu is the last protector of that wisdom. It may even be

II. Imu is the treasure of the Holy Land Mary geoise. He holds the knowledge of the one piece, the knowledge that would unify all humans on earth in the first place, rank and awaits for Joyboy's return in this flower room since decades.

This would explain why he is looking like a demon, zombie corpse. He probably is a very old entity that has a role of a guardian or something like this.

Rocks wanted to take the world with him - he wanted to take Imu for his power and his knowledge - he wanted to realize his dream but Imu holds the truth about the one piece i think and might have concluded a deal with Joyboy in the past. The world = Imu sama The one piece = the mother flamme contained into the Nikka Nikka no Mi The false mother flamme = Imu's base power stoled from the last Joyboy in the past.