Stories behind dlc?

Hey guys, I’ve been wondering, what the hell broke out of solitary? Was it a precursor or the didact?
For ridge line, is the forerunner city an allusion to h4?
What’s the portal in high noon for?
Where is penance located?

Just questions as to why and what is the story behind the maps…

a precusor probably escaped from solitary and the portal in high noon leads to the ark

Solitary.

Damnation.

Hang 'em High.

Timberland.

Headlong.

The wonders people can find with a little research…

Thanks