Hello,
There are some details about the plot of Halo 4 that I still do not understand. I have tried re-watching cutscenes and reading up wikis, but they have not cleared things up.
In the cutscene where the Librarian takes John away and explains the history of the Composer and all that, she mentions how she put a genesong in John. I read up on genesongs and, from what I understand, they are inserted by someone like the Librarian into people of their choosing, but they have no effect until activated. Does that mean John was chosen from birth to have the genesong in him and the Librarian is choosing that moment to activate it to keep him safe from the Composer? Am I even understanding the genesong portion of this correctly?
The second point is regarding the Prometheans. John realizes they are human. But, the Didact had an army of Prometheans fighting for him against the humans all those millennia ago. Am I correct in saying those were Forerunners of a lower class than the Didact? So then, once the Flood was released, the Didact decided to use the Composer on his Forerunner Prometheans. This did not work and he decided to use it on a bunch of humans. The humans turned into “abominations”, but did the Forerunner Prometheans turn into abominations as well? And so, are the Prometheans in Halo 4 a mix of Forerunners and humans with the same appearance? And how many humans did the Didact manage to use the Composer on before he was exiled?
Please correct any incorrect terminology I use. I am quite unclear on this portion of Halo canon.