Potential future "Nu Who Lost Stories".Any leftovers?

A lot were reused. Mark Gattis had "Mr. Sandman" that ended up being split into Idiot's Lantern and Sleep No More. Can't see a massive demand for the origin of those. Paul Abbott had a weird Pompeii one where Rose Tyler would be revealed to be some weird project The Doctor had moulded to be the perfect companion and Jack uncovers The Doctor has manipulated her whole life. Loads of reasons why that wouldn't fly - Barrowman, Eccleston, Piper, overuse of Pompeii. Stephen Fry also had his script for S2 but he said it never got far enough to be anything. Peter Harness had a Meddling Monk is Rasputin story submitted for Capaldi and Paul Cornell had a Land Of Fiction sequel rejected too.

Of course, like the Season 23 and Season 27 audios of The Lost Stories, there's an entire season that wasn't with Jodie's Season 13 ruined by COVID and condensed into Flux. According to Chibnall's podcast appearance that saw a LOT of the resolution for ideas set up in S12 lost due to time. Basically - payoff for The Timeless Child. That changes, and so does Jodie's finale.

A lot of these were casual, off the cuff things and not developed far or seriously intended. The big difference with the classic era is these eps are so much more expensive and important to the BBC that things had to be seriously worked on quite sharply. The classic era could afford to keep studio bound scripts in the back pocket and toss one out quick (happened almost every year under JNT) but not the revived show. Even a last minuter by modern standards - Fear Her - had time the classics could only dream of since pre and post-production takes a lot longer now.

Honestly the new series Doctors time and costs are more of a premium and I wouldn't waste what time you DO get from them trying some of these things that may not have been great anyway, or are just variations on what we did get. Though a proper "what WAS the Timeless Child going to develop into?" is the one that got away for me. No doubt Chibnall would have retooled some things given a very divisive response but I'd love to know. I'd love to know if he's being consulted on the Jo and Sacha ranges too, would seem necessary for the former at least.

Key part for me. BF aren't going to have Tennant the way they did during COVID. Is the best use of his time to make adaptations of stories that weren't made? While I can only imagine Chris' reaction to being offered alternate Series One material. 

Another major difference, the Lost Stories range was built up of stories that we long term fans had read about for YEARS and had something of a mythic status. We KNEW about The Doctor in the safe meeting the cat burgular companion, the Toymaker's return (even had a Target of that), an American Dalek spinoff from Master Plan. DWM and DWB ran many articles. We had interviews with the writers. The DVDs had multiple extras on what the lost stories and seasons would have been. There was also the romance of "here's what things might have been like if the BBC BELIEVED in Who with Colin and Sylv.." - doesn't really work when the show was their flagship quite as well. 

And- whisper it - a lot of The Lost Stories ain't great. It's on average more of an interesting range for us diehards than a high quality one with notable exceptions like Farewell Great Macedon. 

If there was a major one that people knew about and were anxious to have had? Different story maybe. Or if a writer like RTD or Moffat wanted to do a ...Presents" like Hinchcliffe. But failing that? As you say - they could just be done as stories anyway, none were developed enough or have fan excitment enough for a range. If they did, sure - "The Lost Tennant" would be a no-brainer. Well, RTD does have one lost Tennant - when End Of Time was a one parter not on Earth but it sounded pretty awful. While Moffat's "If Tennant stayed...." idea would have just seen a twist on what we already saw - with the future Doc from bits of S5 being a dying Tennant who would turn into Matt (or whomever) anyway with the stories themselves the same..