Theories for Halo

i was really bored so i decided to post this.

plz post theories about the things listed below

* what will happen at the end of Halo 3
* what is the whole history of halo up till Halo 3
* What books will come out and what will they be about
* will there be any more games to the Halo 1,2,3 series
* will there be any more games related to the halo universe
* who r the forerunners
* how did the flood originate

* what will happen to the John Spartan-117 aka/rank Master Chief

feel free to right about which ever of the things listed below

thanks