Peple believe what itachi gave naruto is the 3rd of the 3 tresures
1) A sword - itachi's susanoo was holding this I beleive
2) A shield - itachi's susanoo was holding this I beleive
3) A jewel (I beleive) - with the power to illuminate the darkness
Ok now check this out...
Mahakala: The Great Black One
The legendary history of Mahakala was written by Khedrup Khyungpopa, founder of the Shangpa Kagyu tradition, in the eleventh century. He says that the reason for the special powers and effectiveness of Mahakala goes back to Avalokiteshvara’s vow to remain in the mortal world and not reach Buddhahood until all sentient beings were enlightened. After helping hundreds of thousands of people for countless years to reach enlightenment, Avalokiteshvara saw no decrease in suffering, but rather an increase in defilements. He then became discouraged. As soon as he had that thought, his head immediately split into a thousand pieces. Amitabha, one of the five transcendent Buddhas, put the pieces back together and made eleven heads, telling Avalokiteshvara to make the same promise again but to keep it better. Accordingly out of Avalokiteshvara’s eleven faces, ten are peaceful, but one is wrathful, representing Mahakala.
Avalokiteshvara, saddened, fell unconscious for seven days, after which he thought that the world’s suffering souls needed results in a hurry without excessive effort. He then wished to turn himself into a wrathful deity in order to defeat more rapidly and effectively the obstacles to the happiness of others. With this thought the letter HUM in dark blue color came out of his heart. That Hum became Mahakala. It is not without significance that in the mantra ‘Om Mani Padme Hum’, the syllable Hum invokes energetic powers.
now this sounds fmailiar, one black head with many white heads. The moon's eye plan could be an attempt to fast track everyone's "enlightenment".
I dont know how it connects with the lotus but I thought I would mention it.