Here's one of the spoiler images. You must read it first:
Yes, Madara..... I figured out the truth behind Sai.... long ago. My theory is that Itachi was never Sasuke's real brother. His real brother, still unnamed, but of remarkable(!!!!) resemblance that should NOT be disregarded:
Sai, I officially fandub your name as the "real Itachi".
Comments, anyone?
Yes. And Leia kissed Luke in Empire Strikes Back, and that french went way farther than Konohamaru's joke, so using the "incest" reason because of Konohamaru doesn't count as an argument to sway me from my theory.
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P.S. The "Eyes" story may have been faulty as well. Itachi lea