Shiva's final mission with the Terra Protectorate involved a raid on a scientific outpost that had been taken over by a cult. The door led into the labs. What she saw behind that door will remain a mystery for some time in the graphic novel, but it still haunts her two years later, and she's eventually forced to confront her memories in the flesh.
For me, this is ideally what the book will look and feel like in this panel. My GF was concerned that maybe its too gritty, but she's not sure if it's her personal aesthetic preference. I'd like to avoid overdoing it.