Yeah, more 12 & Bill adventures would be nice. From what I saw of 12’s interaction with the Class characters and series 10, I liked the dynamic where he had students with him on adventures and I wish for more of that dynamic plus more use of the school environment and the Doctor’s apparently novel role as teacher/professor. I kind of felt it was underutilized. I can’t remember if 12 went absolutely cold turkey on any adventures and/or new companions in that 70 year timegap or if there’s wiggle room BF could take advantage of (Speaking of original companions, a fan audio is using the time between Hell Bent and Husbands of River Song to insert adventures with their original companions, so that’s a time gap BF could take advantage of).

I have a feeling if we get a 12 audio with Peter Capaldi back, it would be with Bill’s Pearl Mackie first. I’ve read that Jenna Colemen said she didn’t like the experience of recording with BF for a 50th Anniversary audio or at least was self-critical about the Matt Smith impression she had to do for it, but I can’t find the source for it. Hope it’s not a big issue. The adventures with Ashildr/Me do sound interesting and they could make any appearance in the timeline, including in the newly announced Paternoster Gang series (And, erm, interesting moments where Ashilder/Me could run into herself). There’s also the Jane Austen thread that BF already picked up in one boxset.

Bill and Pilot!Heather could be interesting, with them able to go back to Earth and maybe even meet the Doctor’s future incarnations.