This is a video of the UK equivalent to the ghost shark carrying and firing a Mk48 torpedo. I'm posting here because I would think the ghost shark could do something similar right now and it shows where this drone capability is up to.
I'd be interested to understand how the firing loop works for this. Unlike the ghost bat, you can't have a wedgetail and a FA18 in full communications and control for a submerged drone. For the undersea firing, the ghost bat would need to be able to manage the torpedo homing itself and have a lot more autonomy on firing control.
I will note the mk48 in the video was underslung and naked for the test, so not suitable for extended storage. Given the payload bay for these UUVs are all flooded, I wonder what is available to encapsulate and protect a stowed torpedo in such an environment. I'm thinking a similar encapsulation that the hammerhead mine uses on its mk46 torpedo might be suitable. I think they quote 700 days submerged for the hammerhead, so more than suitable for an undersea drone on combat patrol.
The theme of a mk48 armed ghost bat on extended patrol should not be that far away from reality. I would view that our ability to enforce sea denial becomes a lot more effective once this capability becomes standard on a fleet of several dozen ghost bats anywhere from the coast to 1000kms offshore. Real capability real quick.