I would like to see Mame the most, but I agree with the last poster that it needs someone great in the role. The book will need a little work, but I don't think that much. It IS a period piece.
I agree with all the posters for Dreamgirls and would add Nine to the list. IMO the original production of Nine was one of the most perfect productions ever, and the revival was just terrific.
In the Sondheim canon, the one that I actually want to see the most is A Funny Thing Happened. I would have added the reimagined Maria Friedman Merrily, and I have gotten my wish there. Hopefully, prices will not be totally absurd.
Next for me is The Pajama Game, which has a great score and an enjoyable book. The revival in the early 70s -- couldn't get tickets for the one with Connick and O'Hara -- was really wonderful, even if was not a hit; but that was the days when revivals were generally relegated to short runs at the City Center.
It's also time for Show Boat, but I would vote to recreate the Hal Prince version. OF course, the problem is that it would be prohibitively expensive.
The Producers, if they can get someone who can make people forget Nathan Lance.
I would never have said The Sound of Music, but a production that I saw at the Asolo Theatre just before the Pandemic exceeded my expectations in every way. And it was actually darker than any version I have previously seen.
I would love to see Chess if someone could figure out how to make it work. The closest I have seen to date was the Signature Theatre in Virginia about a decade ago.
Never gonna happens, but I can dream: The Happy Time in a production scaled for the Booth (saw a spectacularly good production years ago at Signature): Over Here (Lupone and Peters in the Andrews Sisters roles...not actually huge roles, but both had showstopper numbers); Hallelujah,Baby, with a reworked book (the concept was excellent, the musical numbers were excellent, and an opportunity for some great performances;
Finally, I would not have previously said Camelot, but the idea of a Bartlett Sher / Aaron Sorkin production is very appealing
SI have zero interest in City of Angels (I hated it and a lot of others apparently did, based on its shortish run, with many months of 3/4 filled houses, even with TKTS) or Grand Hotel. I enjoyed it when I saw it, but remember thinking that once was enough. Twenty years later, I feel the same way. What a lousy score. Not ready for Gypsy, Fiddler, Man of La Mancha, Les Mis...all favorite shows. I think the last revival of A Chorus Line set the record straight that it was never a great show, and I have no interest in it.
Shows that I feel are one-timers and would not be hits a second time include: Me and My Girl, Urinetown (unless Roundabout or off-Broadway -- a terrific show, but I don't see it working economically), Barnum, Raisin and Sophisticated Ladies.