TrippyHippy
Emperor Mongoose
Actually, I think there is are really good ideas for supplements here although not as a historical setting as such.1960's "Transistorpunk"
James Bond or Avengers type of superspies
Mad (Nazi?) scientists
Secret alien invasions (The Vegans?)
Low-powered superheroes & supervillains (example: Batman and his enemies)
All of the above have access to some TL9 technology
Basically, I think making a supplement that ‘pulps up’ the Traveller rules - akin to Pulp Cthulhu - so that you can play something more like Flash Gordon or Buck Rogers (or Star Wars) could be really popular. Secondly, and this could be done in the same supplement or another one - but having a superpowers book for Traveller (letting you run stories like Guardians of the Galaxy or Captain Marvel or Superman even) could also be a great addition.
In the latter case, it could be done as part of a Psionic powers book though, or possibly a book for creating mutants or some such.
And, the other idea, to bring it back to historical settings again, would be a supplement about time travel.
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