Question is - is DWM then going to have another Donna story, or is this a one-off? Because at this point, that's what I'm reading DWM for.

There's another one starting next issue - but it's the last. It's called Time of My Life written by Jonathan Morris and drawn by Rob Davis.

Well, yes, also the audios and the books. Already pre-ordered direct from your Amazon.

*nods* Ditto...

I think Nine/Donna would have a lot of potential, assuming the Doctor was able to process being kicked out of his PTSD rather than being comforted out of it.

That would be interesting...