[PastPrime]

Originally Posted by iamandragon

Spoiler for pretty damn heavy:

Spoiler for really, ultra heavy spoiler:

Spoiler for and it's very long...:

Spoiler for please make sure...:

The birthmark is one of the 'plot traps' the author set. If it wasn't Kyon telling Mikuru about that birthmark Mikuru won't know and tell Kyon the birthmark later on when she returns in the futher future who won't know about the birthmark to tell Mikuru in the eariler future who won't know it in the later future to come back and tell Kyon who won't know about the birthmark to tell Mikuru in the eariler future.........................Later on in vol. 4 Kyon travelled 3 years back in time to help Suzumiya to do all her cult(e.g. grafitti in school). The mystery started unrevealing itself---it's not Suzumiya who's having her wishes granted, it's Kyon. He is the cause of everything 3 years ago. He is the cause of Suzumiya becoming a 'god'. He is the cause that Mikuru came back from the future because he made Suzumiya a god who wanted a time traveller to be on her side which caused Mikuru to come back from the future and later on take Kyon to the past to help Suzumiya in the past making Suzumiya a god who wanted a time traveller to be on her side which caused Mikuru to come back from the future and later on take Kyon to the past to help Suzumiya in the past making Suzumiya a god who wanted a time traveller to be on her side.............................................. ...

There are clues here and there everywhere as the novel goes on. Remember when Kyon and Suzumiya first met in vol. 1? Suzumiya asked him 'have I met you before?' The answer is 'no'. Fact is, Suzumiya have met Kyon 3 years, but not the Kyon she see, but the Kyon she see in vol. 4.
Another clue is obvious--right in the beginning of the whole series Kyon said he don't want to be the main character, but rather, the a side character, and thus he became the side character with Suzumiya becoming the main character,

I have much more to say but I'm too tired...

A spoiler yes, but a surprise no. That is basically what I had been thinking all along. I even posted a similar speculation.