Okay I've been working on some motion comic style concepts to use for the flashbacks throughout - I chose the style since these segments will be exposition heavy and I'd have a lot more freedom.

Here's the first realised concept, the others are still pretty sketchy. Please keep in mind it is ROUGH and of course motionless atm.

The first major flashback being what used to be the prologue scene. The idea being that as the main story flows in a linear fashion the flashbacks start with the most recent and move backward to the earliest event - and the greatest reveal.

I'm still toying with visual styles. Here's the original shot for reference...