These are assumptions that have to be made and asked if you ever want answers. Here's what we know: a number of mainstay Uncharted developers and creative people left, all around the same time, at the height of development on their big next gen project and the studio wants to bury it as deeply in the past as possible. But yes, we don't know what happened.
Bury it deep in the past?
Okay Fonda you have to be joking if your not joking and aren't a 15 year old girl im going to start getting worried.