Interesting thought what would make good Sci-fi/Fantasy Movies. Previously much of sci-fi and fantasy was off limits as the settings (and other races) were unachievable at any price. Movies like the Avengers pictures, Project Hail Mary, Lord of the Rings and the recent Dune show that the capability is there (although at a steep price in some cases.
Some I can think of are:
Lensman series: Start with Galactic Patrol, tweak SOME of the characters (e.g. make C. MacDougall a full blown doctor instead of a nurse). The No Female Lensman will be a hard sell (with one exception) but I think it has to stay. At one point J Michael Straczynski of Babylon 5 fame was looking at this in the early 2010’s but I think the rights expired
Zelanzy’s Amber Series. Nine Princes in Amber starts as a noir pulp mystery and then goes weird. Casting will be hard, the initial movie shouldn’t be too hard/expensive, though, as we move through things, the movie cost goes up. Do it right, and it will be no problem
Heinlein The Moon is A Harsh Mistress, No aliens, mostly indoor shooting, a rogue AI this actually might be a cheap one and done right would be a stunner.
Connie Willis To Say Nothing of the Dog . Again mostly indoor shoots and outdoor in some equivalent to the River Thames River C. 1890. Get all the Victorian costumes from the BBC for a few pence. A comedy, a time travel story, a mystery, rescuing an extinct species, and some romances rolled all into one. It’d make a great date movie. Again, I think casting will be critical, people are going to have to really sell their roles and the number of modern actors who do that well are limited.
Matt Dinniman Dungeon Crawler Carl series: I just ran into this. It is a riot about how Earth and its populace get turned into a reality show of a dungeon. all the fantasy animals will be a bear and having a magically enhanced Persian cat as a main character may present issues, but again, limited sets, and this will draw the male/gamer audience back to the theater (and their Dates may just enjoy themselves in the process)
Any other thoughts on these (or others)?